Cut out a 45 degree corner. We cut the corners of the ceiling plinth: tools and cutting methods. Characteristics of cutting different angles

In the interior, many varieties of platbands are used. They differ in the material from which they are made, in their shape, color and quality. Usually, either wooden or plastic trim is used to frame doors or windows.

According to their shape, platbands can be divided:

Flat - have a simple, uncomplicated look, and they are most often used.

Rounded - the frontal part of the frame has a rounded appearance.

Curly - can combine in themselves various forms. They look very unusual and quite attractive.

The material from which the straps are made can be very diverse:

Wood is the most common material, as it is environmentally friendly and not expensive.
Plastic - made in any color and shape. The most durable material and fairly easy to install.
Metal - allows you to experiment with the most unusual patterns, create various shapes.

The frame is also classified according to the type of thread.

Welt - the pattern is made through the entire area of \u200b\u200bthe bar.
Consignment note - the finished pattern is nailed or glued to the finished background.

According to the method of mounting the platband, there are only two types.

Overhead - mounted on the doorway.
Telescopic - they have spouts that are inserted into the holes of the door frame during installation.

How to cut a platband with a miter box

To work, you will need the following tools:

Miter box;
Hacksaw;
Workbench.

A miter box is a tool that allows you to cut a product at any angle. It looks like a tray that is made of wood or an alloy of metals, but most often it is made of plastic. On the construction market you can find a simplified version of it, you will need it for cutting at an angle of 45 degrees, but there are more complex structures, they are designed for cutting at an angle of 90 degrees.

In such work, it is also important how cutting tool enjoy. Depending on what material the frame is made of, you need to choose a specific tool so as not to damage the product. For example, a hacksaw is suitable for cutting a metal bar, it is also suitable for a plastic frame. And for wooden product you need to use a hacksaw for wood. From whether it will be used when cutting right tool depends on the accuracy of the cut and the quality of the work done.

The workbench will facilitate the work in terms of the fact that everything necessary tools will be at hand.

In order for the bar to be cut correctly, you need to follow the step-by-step instructions with accuracy.

Step 1. The frame must be leaned against the doorway and the required length marked, and then cut off the excess part.

Step 2. We install the bar in the miter box in a position in which it will be attached to doorway. It must be pressed against the far side of the tool.

Step 3. At an angle of 45 degrees, cut off the bar.

Step 4. By the same principle, we set the second striker to the far side of the tool and its mode.

For the accuracy of the work done, before fastening, we join the two parts of the platbands, and if there are no gaps between them, you can proceed with their installation.

For a complete presentation of such work, you can watch the video.

How to cut trim on your own without the help of a miter box

If it is not possible to use the miter box, then you can make it yourself or do without it at all.

To properly cut the frame without the use of a special tool, you can use the usual markings on the wall and at the same time get a good result.

For work you will need:

Pencil;
Roulette;
Ruler;
Hacksaw.

To complete the work you need to follow the step-by-step instructions.

Step 1. We fit the bar to the wall where it will be attached, and draw a small line along it.

Step 2. Now, in the same way, you need to draw a line by attaching a second casing to the place where the corner should be.

Step 3 When everything is drawn, you should get a markup on the wall that looks like two crossed lines. The point where these lines intersect must be transferred alternately to two strips.

Step 4. The mark transferred to the frame will be the cut line, for this, draw a line from the mark to the other end and cut it off.

Step 5. We apply two parts of the plank to the wall in order to correct the angle, if suddenly there was a mismatch.

To cut off a corner using a homemade miter box, it is quite possible to draw it on cardboard, a board, or on a regular sheet of paper. To do this, you need to draw the angles with a protractor at the desired degree. enjoy this homemade tool in the same way as the purchased one, namely, we set the platband parallel to the line with the desired degree and cut it off.

The main advantage of such a drawn tool is that you can draw an angle at absolutely any angle.

How to attach platbands yourself

When the corners of the platbands are cut, you can mount them to the wall. It is recommended to do this with decorative nails with small heads, and not with glue, since the glue is not durable. And if the frame needs to be replaced or removed for painting, it is much easier to do this with nails, and if the bar was attached to glue, then it can be easily damaged when removed.

There are only four ways to attach such a frame:

Finishing nails
Liquid nails.
Self-tapping screws.
Use of platbands on latches.

Installation with finishing nails is the most common method. In the work it is recommended to use nails 4 centimeters in length and no more than 1.5 millimeters in diameter. Holes are drilled at a distance of 5 - 7 centimeters, after which nails are hammered into them, but not completely. Now you should remove the nail heads with the help of side cutters and mask with a wax pencil of the same color as the plank itself.

If the surface of the wall to which the frame will be attached is completely flat, and the planks are made of MDF material then the method of fastening to liquid nails is suitable. To do this, it is necessary to apply such nails to the wrong side of the plank and attach it to the wall, holding it in this state for some time. After that, fix the frame with tape. This method is quite simple and its main advantage is that the front part will not be exposed to mechanical influences. But it will take a lot of effort to remove it.

Advice! Attach the trim to the wall first and mark it outside. After the platband can be removed, and glued along the contour masking tape- it will easily peel off, leaving no traces, even from the most capricious surfaces, but if liquid nails come out somewhere, you do not have to wipe the glue off the wall. It will be enough just to peel off the tape.

To attach the casing with self-tapping screws, it is necessary to make not very deep, but wide enough holes in it. This will be needed so that the caps of the screws are not higher than the frame itself. To decorate the screws, you can purchase special caps on them of the same color as the bar itself. It is recommended to use self-tapping screws 2 centimeters in length and no more.

The door frame on the latches looks like the letter "G". It is very easy to attach which is a plus. Its "beak" moves into the hole and snaps into place. The downside of this method of fastening is that it is not so easy to remove it, and when re-attached, the casing can delaminate, and subsequently will not look beautiful.

All of the four proposed options for fixing the frame are not difficult, you just need to choose the one that is right for the interior of the room.

The repair of the ceiling is completed with the design using ceiling plinths. Their pruning is not a daunting task, but requires some skill and accuracy. We will tell you how you can cut ceiling baguettes using a special tool - a miter box. Since it is not available in all homes, we will also consider an alternative option in which you can do without it.

And now - about everything in order.

What tools will be needed?

Miter box - this aluminum, plastic or wooden professional carpentry tool has the form of a groove in the shape of an inverted P. With its help, the material can be sawn at the required angle. Usually it is fixed on a table or workbench. It is safe and convenient to operate;
Electric miter saw that replaces the miter box. Provides high precision cuts;
An electric jigsaw with which you can;
A sharp and well-sharpened knife for processing foam baseboards;
Saw for manipulating wooden baguettes or canvas - when working with everything else, including foam and plastic.

Miter box for cutting skirting boards

Cutting with a miter box

The use of a miter box is justified when the room has relatively even corners and walls. For the correct cutting of the angle, the part in which it is supposed to be washed down is placed in the miter box, and the saw is inserted into the tool guides. Remaining motionless, the part allows you to "cut yourself off" at the required angle.

For a fillet to be effective, it must be in tight contact with both surfaces at the same time. This is possible if it is tightly pressed against the wall of the tool by a section closer to the working one.

Suppose you want to cut a 45 degree angle. First of all, the baguette should be correctly positioned in the miter box.

Cutting sequence:

Having determined the direction in which the cut will be made, we cut off the corner;
We add together the cut sections, we get two corners: external and internal;
Having attached the miter box to the ceiling, we check how even the cuts are. If necessary, something can be corrected with a knife or use the services of putty.

Cutting without a miter box

Often it simply does not make sense to purchase this tool for a professional for one repair. You can completely do without a miter box, with the help of a pencil, a sharp sharpened knife and a good eye. How? There are several ways here.

Method one: prepare something similar. To do this, you need to put together a tray using three boards, then make a cut at an angle of 45 degrees, and to facilitate further actions, mark up using a school protractor or a square.

DIY miter box

Method two: a paper or cardboard template is cut out, on which an orientation line is drawn. In this case, when nailing planks at an angle of ninety degrees, they will need not three, but two! How are corners trimmed? We put the baguette into the analogue of the tray prepared by us in such a way that its position corresponds to that with which the plinth will be fixed to the ceiling, then we expose the tray along the edge of our standard. Next, you should cut the baguette along the line drawn on the standard, holding the cutting tool in a vertical position.

Another method using an arbitrary tray. It can be imitated even by a table pushed close to the wall, or at least the corner separating the wall and the flooring.

Corner cutting:

We mark the expected angles on the ceiling and wall, as well as on the fillet itself, focusing on an imaginary line that cuts both parts of the baguette;
We install the plinth in the tray in the same way as it will be further fixed to the ceiling, and cut it with a knife or cloth held in a strictly vertical position.

How to cut without tools?

In this case it is necessary:

Make the necessary marks on the baguettes;
Connect the edges of the baguettes with the marks using an ordinary ruler. In the future, trimming can be done, already making measurements at the top;
Having laid on the table the segment intended for trimming, with the area that will join the ceiling, we cut it at a 45 degree angle. The need to correct will in this case be much less;
The above steps are repeated for the outer corner.

You noticed that we did not need any special tools: we just need to tune in to the fact that there may be a need for adjustment.

How to make the correct docking?

If after gluing part of the baguette there is some distance left to the corner, you need to think about how not to make a mistake - a small margin will not hurt. At first, it is better to cut off a piece with a good margin of about 10-15 cm. Then, cutting off the corner by any convenient method, try it on on a dry surface. To do this, attach a bar to the ceiling and mark the point where the shortening boundary will pass. We cut at right angles.

Equally important is the competent docking of corners. Finished skirting boards are usually fixed at an angle slightly less than 45 degrees, so there may be inconsistencies in the cut edges and gaps. Here, the initial trimming of the corners is followed by a dry, as precise as possible docking of the skirting boards already on the ceiling itself. Problems usually arise when using wooden and plastic materials.

At the end of the rough joints of the fillets, either screw them on, and then, if necessary, use the help of putty and then seal all existing seams.

A ceiling plinth is a product that looks no different from its counterpart for flooring. It is also called a fillet. This detail serves to mask the joints of the wall and ceiling. It is installed at the very end of the finishing work, since the element does not carry any functional load, but only plays a decorative role. The installation process of the product is quite simple, but many are faced with the dilemma of how to make the corner of the ceiling plinth. Depending on the selected materials and tools that are available, the corners of the fillet are cut in different ways.

Creating fillet corners

To connect two planks, you can use decorative corners for ceiling plinths. But in the absence of such, the material will have to be processed. Next, we will talk about how to properly cut a corner on a ceiling plinth.

How to use the treatment chair

A miter box is one of the simplest carpentry tools, with which they cut various products at different angles. Usually it is a plastic, metal or wooden tray with several slots in the walls. The simple version only has slots for 45 and 90 degree angles. In more complex ones, there are more angles, and a professional tool is equipped with a rotary mechanism that allows you to direct the cutting element at any angle. The principle of operation is simple: before cutting off the corner of the plinth, the workpiece is fixed in the tray, and then processed with a cutting tool (knife, saw, and so on), lowering it into the slots.

Trimming the ceiling plinth with a miter box

How to slaughter ceiling plinth for the inner corner on the stool:

The first step is to attach the baseboard to the surface and mark the required length with a pencil.
Then install the item in the tray so that its current position coincides with the position on the surface.
Using the clamping mechanism, the plinth is fixed on the far wall of the tool container.
The product is taken with the left hand. After that, it is necessary to choose the correct position of the cutting element (angle of 45 degrees). In this case, the handle of the tool should be as close as possible to the left hand.
Applying light pressure on the part, trimming begins. It is important not to press the product too hard, otherwise you can deform it.
The same manipulations, only in mirror image, must be carried out with the second plinth.

Then the trimmed strips must be checked for correct processing. To do this, it is enough to connect the ceiling plinth by simply attaching the planks to the surface. If a wooden product is used, then it will most likely have to be further processed with a file.

On a note! First of all, it is necessary to arrange the internal corners on the ceiling plinths, only after that proceed to the external ones. Otherwise, the length of the purchased strips may not be enough.

How to properly cut the ceiling plinth for the outer corner:

Before cutting the corners, you need to attach the fillet to the edge of the wall so that the product extends slightly beyond the surface, and make a mark.
Then do the same operations as in the previous instructions.
At the end, make a fitting and, if necessary, additionally process the edges with a clerical knife or file.

Important! To cut the corners of the skirting boards with a miter box, you need a perfectly even angle of the surfaces of 90 degrees. If there are any irregularities on the walls, due to which deviations of more than 2 degrees will be present, other tools will have to be used.

Processing fillets using markup

Most often, the result of the finishing alignment are even corners. But in some cases, the deviations are so large that even after fitting and filing the fillets with a file, gaps remain. And then the question of how to properly cut the ceiling plinth with a miter box will be meaningless, since in this situation it is better to cut the planks with a preliminary fitting on the spot. To carry out this procedure, you will need the following:

A thin hard pencil or marker (such a tool leaves clear lines, so you don’t have to peer).
A small fragment of a fillet.
Ruler or tape measure.
Special construction or clerical knife for processing polystyrene, polyurethane or PVC baguettes.
Saw or hacksaw for processing wooden skirting boards.

Before cutting off the ceiling plinth, it is necessary to lean the plank against the corner and draw a line along the outer edge of the product on the ceiling surface. Then attach the same fillet fragment to the opposite wall and draw the same line.

As a result, an intersection will be obtained on the ceiling surface, in which it will be necessary to dock the cut products. The resulting mark is alternately transferred to the parts that will be joined.

Then you need to take a ruler and connect the edge of the fillet with the markup. After that, the product is placed on the table and cut along the line.

This method is quite simple, but it comes with some risks. As a result, the inside of the skirting board can interfere with the connection of the parts on the surface. To prevent this from happening, you can do this: before cutting the ceiling plinth in the corners, it must be placed on the table in the same position in which it will be glued to the wall. Then cut the outer corner or inner corner at a 45 degree angle. Similarly, the next bar should be processed. In this way, lengthy processing after fitting can be avoided.

Next, you need to adjust the joint, but already at the installation site of the fillet. That is, before gluing the ceiling plinth in the corners, it is necessary to check the internal joint without applying adhesive or fasteners. Then carry out the same manipulations for the slats of the outer corner. After preliminary fitting and bringing the corners to an ideal state, you can glue the products.

Now the question of how to join ceiling plinths at uneven corners should not arise.

Trimming with a square

Now let's look at how to cut a ceiling plinth using a standard set of tools. For this you will need:

ruler or tape measure;
square;
construction, stationery knife or hacksaw.

How can I cut off the corner of the ceiling plinth if the surfaces are perfectly flat:

A ruler is applied to the fillet at an angle of 45 degrees. Using a knife, an unnecessary fragment is cut off with one movement of the hand.
In the presence of a wooden product, the plinth is first marked with a pencil, after which it is sawn off with a saw or a hacksaw.

If the wall surfaces are uneven, then the first step is to measure the degree of the angle, and then divide it into two. Let's say the angle is 80 degrees, which means that each product needs to be cut at an angle of 40 degrees.

If adjacent walls do not form a right angle, then in order to cut the baseboard, you will have to do some calculations.

Decoration with decorative corners

The easiest way to join ceiling plinths in the corners is to use special products. They are sold in hardware stores and are immediately ready for use. Fillets are simply glued to the surface, and the junction is closed with a decorative element. In this case, the question of how to properly cut the plinth does not make sense. Even if the joint turned out to be uneven, this defect will be hidden by a decorative corner.

How to replace the miter box with improvised means

How to make the corners of the ceiling plinth using improvised means? There are several ways:

First way. It is necessary to prepare three wooden boards of the same thickness and width. Using nails or self-tapping screws, connect them into a U-shaped structure. Mark the 45 and 90 degree angles (you will need a square or a protractor for this), and then make cuts with a hacksaw. The result is a homemade miter box. How to cut ceiling plinths with this tool is indicated above.

The second way. In this case, before cutting the ceiling plinth, a simple structure should be built to hold the fillet. To do this, you need to take two boards and put together a corner from them. Then take paper and draw lines on it, going at different angles. Now let's look at how to cut corners using the resulting tool:
- fillet is laid on a wooden corner;
- in the marked place - a template with drawn lines is applied to the product and trimmed.

The third way. This method is the easiest, but it requires some experience and a steady hand. In this case, you can use any design that has a right angle, for example, a table.

On a note! Before cutting a corner, measurements should be taken at the fixation point. To mark the inner corner, they begin to measure from the junction of the walls. Before cutting out the outer corner, it is necessary to mark, taking into account the fact that the product will go beyond the surface boundaries by its thickness.

The process of making a miter box at home demonstrates the video:

Installation of skirting boards

This operation will be successful if you follow a few recommendations:

Installation of ceiling fillets begins precisely with the design of the corners. After completing this operation, you can proceed with the installation of the remaining parts.
During fixation of products, it is necessary to press their edges so that there are no gaps left. In this case, excess glue should be removed immediately so that it does not have time to dry.
If a PVC skirting board was purchased, then to fix it, you can use the finishing putty, which may have remained after the finishing work.
Before gluing the skirting boards to the ceiling, it is necessary to treat the surfaces with a special primer or simply with water. Then the fillets are installed in their places and wait until the surface under them dries out. At the end, the seams and cracks are sealed with sealant or other material with a similar composition. It is better to use sealants containing acrylic.

Installing ceiling plinths is a fairly simple procedure that even a novice master can handle. The main thing is to follow the above recommendations and regularly check the correct installation with a level, even if the fillets look perfectly even to the eye. It is also important to remember that this element carries an exclusively decorative load, so even the smallest oversights are unacceptable.

During repair or construction, it is not uncommon for a situation where it is necessary to make a junction of two parts so that it fits perfectly into corner rooms. If it is necessary to cut corner at 45º, proceed in one of the following ways.

You will need

- ruler;
- pencil, pen, marker;
- paper;
- protractor;
- miter box;
- knife, scissors, jigsaw and other cutting tools.

Instruction

If the surface of the material is large enough to make marks, draw one of the cut lines with a ruler. Then draw a perpendicular to this line using corner a box or any object with even edges, such as a sheet of paper or a book.

With a ruler, mark equal segments on each side of the corner, for example, 10 cm each. Measure the distance between the points obtained and divide it in half. Connect this point to the top right angle. You received corner at 45º, now cut the material along the drawn lines with scissors, a knife, a jigsaw or other tools.

Mark one of the cut lines, take a protractor and attach to the line. Find the 45º mark on the scale and connect this point to the center of the protractor. Cut the material along the marked lines with available tools.

Cut paper, film, foil or other easily bendable material as follows: find or draw a straight corner(for a sheet of paper, this is any of its corners). Bend the sheet so that the adjacent sides match. Cut the sheet along the fold line.

If you need to cut corner at 45 degrees several times, for example, when fitting a skirting board, make a template. To do this, take a thick cardboard, draw a square on it and cut it diagonally.

In order to cut materials at an angle of 45º in large volumes, buy a miter box, this tool can be easily found in any hardware store. Insert the skirting board or rail inside as it will be located in the space, and cut it with a knife, jigsaw or other tool.

Sent by: Nikolaeva Kristina. 2017-09-15 21:54:59

How to cut a ceiling plinth so that the corners are perfect

In the corners of the room, when installing a ceiling plinth, for example, from foam plastic, small inconsistencies can often occur that spoil the overall appearance of the room. This, of course, can and should be avoided. So, how to cut the plinth with your own hands exactly? The first assistant in this matter will be such a tool as a miter box. But buying one for a one-time repair is not always advisable. Although, if you decide to help all relatives and neighbors with repairs, and in the future also earn money on this, then you need this device.

An example of ideal angles

If you are still limited to one installation of the plinth at home, then it is not necessary to use such a carpentry tool. You can do without it. In order to consider all the ways to properly cut a ceiling plinth, we will find out what it consists of.

To understand how to properly cut a plinth, you should understand its composition. This will help you choose the right tool and cutting technology.

Styrofoam. The price and strength of this material is the lowest. But since we are creating a decorative decoration of the ceiling, strength is not particularly required.
The ceiling plinth made of expanded polystyrene is denser. than regular foam. For cutting such material, the most common knife is used.

Tip: sharpen your knife well before use. This will eliminate the presence of torn edges at the incision sites.

How to cut a skirting board straight

Wood. Here you have to put more effort into processing. For wood, use only a hacksaw.

Tip: the smaller and more frequent the saw tooth, the smoother the edges will be. You can even use a sheet for metal.

Plastic. How to cut a plastic plinth? The same method as with a tree is suitable here - a saw, a hacksaw. Alternatively, you can also use a grinder.

Using a regular hacksaw blade

Cutting methods

The product is installed around the perimeter of a rectangular room. Trimmed to finish right angles. Therefore, we will consider how to cut the baseboard 45 degrees.

Cutting with a miter box

What is a stool? This is a special tray made of wood, aluminum or plastic with grooves provided to guide the saw at the desired angle.

Here is a brief instruction on how to use such a carpentry tool:

Training. We take the product and put it in the tray. Align to the position in which it will be installed on the ceiling.
Cutting. With the other hand, insert the cutting tool into the groove. It can be a knife or a hacksaw. And boldly cut. The device will not let you miss the intended place.

You should know: a metal blade is also suitable for cutting foam.

Treatment. A wooden skirting board may need to be further filed to even out the cut edges. Plastic or foam plastic can be touched up with a knife, the main thing is that it is sharp enough.

Tip: when cutting, do not put pressure on the product. Styrofoam can crumble, and wood can even split.

That's so easy and simple to use miter box

Cutting without a miter box

If you do not have such a device, and you are not going to purchase it for one-time use, then you can use the following methods to cut the baseboard at 45 degrees.

The first way is to make this simple carpentry tool yourself. To do this, knock down the most common tray made of wood. Then we measure the lines of the slots using a protractor or a school square. We cut the grooves and we have a primitive fixture ready.

The second way. how to cut a skirting board at an angle is even simpler. It is especially painless to use it in cases where the corners of the room are not even.

We don't need a tray. Enough of two boards knocked down at 90 degrees and a cardboard stencil with a line drawn for orientation.

The third way. In this case, we do not knock anything down at all, but simply use a table attached to the wall or any other similar structure.

We mark future joints directly on the product itself, on the wall and on the ceiling. We apply the plinth as we are going to mount it, and cut it according to the marks.

The simplest way without the use of special tools

Keep in mind that while cutting, hold the tool strictly vertically to obtain a right angle.

Features of cutting various angles

We have analyzed the general technology of how to cut ceiling skirting boards.

How to cut a part or product at an angle of 45 degrees

But it also has some nuances in cutting different angles of this product.

Internal floor

View of the inner corner

First, let's set the left and right plinths at a right angle. We insert the left product into the miter box, applying to the outside, cut off the left inner corner. Then we do a similar operation with the right. Ready.

External floor

View of the external floor corner

In this case, using the miter box, we are not in the mode of the inner, but the outer edges. The rest of the operation is similar.

External ceiling

View of the outer ceiling corner

We already cut the ceiling corners on the inside of the fixture.

Having inserted the left plinth into the miter box, we cut off the left outer corner. We substitute the right - the mode is the right outer edge.

Internal ceiling

View of the inner ceiling corner

By analogy with the outer corner, we cut off the inner one. We only cut the inner left and right edges, respectively.

It is important to remember: the product is always attached to the ceiling upside down. Therefore, insert it upside down into the miter box. This will help you cut the skirting correctly.

Install the skirting board only when you have already prepared the next one. Do it better on the floor, not under the ceiling.
Patience, patience and more patience. Joints sometimes have to be corrected more than once. Do not be nervous, be careful, and everything will work out.
With the use of foam and plastic, you can afford to leave small gaps at the joints of the corners. The putty hides them well. Be careful with the tree.

Results

Effort pays off

If you still have some questions, then the visual in this article will help to resolve them.

By carefully following the recommendations and taking into account the characteristics of the material you are working with, you can give your ceiling beauty and originality. Choose the way you like and go! You will succeed (read also about the benefits of PVC plinth).

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Such an angle in geometric problems occurs quite often, so it is important to understand what it is and how to build it.
The easiest way is to build an angle of 45 degrees without special tools (like a protractor) on a sheet of notebook in a box.

We cut the corners of the ceiling plinth: tools and cutting methods

To do this, you need to understand that the angle of 45 degrees is equal to half the right angle, that is, the angle of 90 degrees:
45 = 90 / 2.
On a notebook sheet in a box, using a ruler, you can easily build an angle of 90 degrees (that is, a straight line):

To do this, you need to select one point at the intersection of the cells and draw a vertical and horizontal line from it.
To build half of the angle of 90 degrees, you need to draw a straight line from an arbitrary point, and the second straight line needs to be drawn along the diagonals of the cells. It is convenient to mark several such points on the diagonals of the cells (as in the figure), and then connect them with a straight line:

After connecting these points, we get half an angle of 90 degrees, that is, an angle of 45 degrees.

It's also useful to remember that a 45 degree angle is an acute angle because it's less than 90 degrees.
To construct an angle of 45 degrees, it is not necessary to put down several points on the diagonals of the cells. To do this, it is enough to mark one such point and connect this point with a straight line to the point of the beginning of the first side of the angle.