Use a triangular ruler to draw angles of 45 degrees, 60 degrees, 90 degrees, 105 degrees, 120 degree

There are two kinds of triangular rulers, the three angles of the right-angle triangular ruler are 30 degrees, 60 degrees, and 90 degrees, and the three angles of the equilateral rectangular ruler are 90 degrees and two 45 degrees respectively

1. In a plane, draw two kinds of triangular rulers and mark the angles, which is convenient for the following drawings.

2. Use a triangle ruler to draw a 45-degree angle.

3. Use a triangle ruler with an angle of 60 degrees to draw a 60-degree angle.

4. Use a triangle ruler to draw a 90-degree angle with a 90-degree angle.

5. Add a 90-degree angle and a 45-degree angle to draw an angle, and then subtract a 30-degree angle from the angle to get 105 degrees.

6. Draw twice with a 60-degree angle to get a 120-degree angle.

7. Use two 90 degrees to get a 180-degree angle.

Hello, there are two types of triangular rulers: 1. One 90° angle, two 45° isosceles right triangles; 2. One 90°, one 60°, one 30°.

Whatever you buy in **, a set will definitely contain both.

In this case, it is very convenient for you to draw this special angle, which is explained as follows:

Draw directly with 4 corresponding corners;

105°: Draw at angles of 45° and 60°;

120°: 1. Draw 60° twice; 2. Draw at 90° and 30°;

180°: Just draw a straight line.

According to the power required by the question: 30°?

There are usually two triangles in a set, one of which has three angles for my day, and a triangle ruler corresponding to this degree! Your question is actually – don't you have a triangle!

Now you know how to draw, 90°, and the other is 45°, just compare to drawing.

We know that the triangle pair, they have an angle of 30 degrees, 45 degrees, 60 degrees, 90 degrees. So 45 degrees, 60 degrees, 90 degrees are all ready-made triangle angles. 180 degrees is a flat angle.

It can also be 90 degrees plus 90 degrees. 120 degrees, that is, two 60 degrees, this is a little more troublesome, you need to draw a green map first, and then spell a 60 degree next to it, because the two triangles only have one 60 degrees. You can also use 90 degrees plus 30 degrees flat, and that's easy.

Relatively speaking, 105 degrees is more convenient, because it is equal to 60 degrees plus 45 degrees, which is just right, this point will put it together, and you can draw it.

To sum up, with a triangle board you can draw 45 degrees, 60 degrees, 90 degrees. It can also be turned into 180 degrees. Splice with two triangles; You can draw 75 degrees, 105 degrees (60+45), 135 degrees (90+45), 150 degrees (9 9).

Can you draw angles of 15 degrees, 150 degrees, 165 degrees, and 75 degrees with a triangular ruler, and how.

How to draw at 15 degrees.

Draw a 30-degree angle first, and then draw the bisector of the angle (take two points on both sides of the angle, so that the distance from these two points to the vertex of the angle is equal, and then use these two points as perpendicular feet to make two perpendicular lines, and then connect the intersection of these two perpendicular lines with the vertices of the angle, and the resulting line is the angle bisector), one of which is a 15-degree angle.

Draw a 150-degree angle, first issue a 90-degree angle, then a 60-degree angle, and add up to 150 degrees.

Start by drawing a flat angle, then subtract the 15-degree angle from the evaluation.

To draw a 5-degree angle, draw a 90-degree angle and then subtract a 15-degree angle.

15 degrees requires 45 degrees of isosceles right triangle and 30 degrees of right triangle, 150 uses 90 degrees + 60 degrees, 165 uses 180-15, and 75 is 45 + 30 degrees.

Triangular ruler only.

In the first image of the first row: 15°=45°-30°;

First line. In the second and third figures: a triangular ruler can be used to draw the angle of °;

In the fourth picture of the first row: 75°=30°+45°;

In the fifth picture of the first row: 105°=45°+60°;

In the sixth picture of the first row: 120°=90°+30°;

In the first picture of the second row: 135°=45°+90°;

In the second picture of the second row: 150°=90°+60°;

In the third picture of the second row: 165°=90°+30°+45°;

In the fourth picture of the second row: 180°=90°+90°.

A set of two triangular rulers has a total of four degrees: 30 45 60 90 so that it is convenient to draw angles:

With a triangular ruler 30 degrees, 45 degrees, 60 degrees, 90 degrees, all ready-made 75 degrees = 30 + 45

105 degrees = 60 + 45, 135 degrees = 30 + 45 + 60, 128 degrees = 60 + 60 + (45-30) 2

A set of triangular rulers.

There are four degrees of du: 30 45 60 90 so draw the angle zhi

It's convenient:

With a triangular ruler of 30 degrees, DAO back 45 degrees, 60 degrees, 90 degrees, are all ready-made 75 degrees = 30 + 45

105 degrees = 60 + 45, 135 degrees = 30 + 45 + 60, 128 degrees = 60 + 60 + (45-30) A2

It's impossible to draw 128 degrees, and the triangle is already there.

75＝30＋ 。135=45+90。You can also draw 150 60+90

30, 45, 60, 90, directly have, 75 = 45 dec. 30105 = 60 dec. 45, 135 = 180-45

128 can't be drawn.

Use an isosceles right-angle triangular ruler to draw a 45-degree angle first, and then use another triangular ruler with a 60-degree angle to draw a 60-degree angle, so that the two angles form a 105-degree angle.

Two identical isosceles right triangles can be put together into a square, or they can be put together into a larger isosceles right triangle. The two right-angled sides of an isosceles right-angled triangular ruler are equal in length. Two identical slender triangular rulers can be put together to form a regular triangle.

The length of the hypotenuse of a slender triangle is twice the length of the short right-angled edge.

Thank you for asking a good question, no more talking.

Use a 45-degree triangular ruler.

and a 30-degree triangular ruler.

Two horns together is 75

The degree of a triangular ruler angle is 90°, 45°, 45°, 90°, 30°, 60°, the angle that can be drawn is certain, they have a commonality, they are all multiples of 15, and 50° is not divisible by 15, can not be drawn.

I don't seem to be able to finish your problem, so you can't do it either. Because the angle of a triangular ruler is 90 degrees, 60 degrees, 30 degrees, and 45 degrees, the minimum angle that can be determined by the triangular ruler is 15 degrees, and the others are multiples of 15 degrees, and 50 degrees is not a multiple of 15 degrees, so it is impossible to draw a 50-degree angle with a triangular ruler.

Because the degrees of each angle in a triangular plate are respectively °, and the angles that can be obtained are 60° 45° 15°, 60° 45° 105°, 60° 90° 150°, 90° 45° 135°, 90° 30° 120°, 30° 45° 75°, and it can be found that the angles that can be drawn with a triangular ruler are integer multiples of 15 degrees

The degree of the triangular ruler is fixed, and it is not possible to draw an angle of 50 degrees.

A triangular ruler cannot be drawn.

The drawing method is as follows:

That is, the angle of 45 degrees and the angle of 60 degrees on the triangular ruler are combined together to form an angle of 105 degrees.

Analysis] Because there are two right-angled triangles in a pair of triangles, one is an isosceles right-angled triangle.

Their three degrees are °, and the degrees of another right-angled triangle are ° and 90° respectively, because: 60°+45°=105°, so the angle of 45 degrees and 60 degrees on the triangle is 105 degrees. That's it.

A 60-angle triangular ruler and a 45-angle triangular ruler together, that is, 105 degrees.

When a big triangle is given, I talk about another thing standing.

How to draw a triangular ruler if it is not sharp.

Angles: The three angles of the right-angled triangle, the degrees are 90°, 60°, 30°. If you want to draw a 120° angle, you can use a 90°+30° angle to achieve it, or you can use two 60° angles to draw it.

The triangle has two triangles, and the isosceles right-angled triangle has two acute angles of 45° and a right angle of 90°. The thin baina has an acute angle of 30° and 60°, respectively, and a right angle of 90°. — 1 right angle and 2 acute angles on the triangular ruler.

Draw 120 degrees with a triangular ruler. of the horns.

The three angles of the right-angled triangle are 90°, 60°, 30°. If you want to draw a 120° angle, you can use a 90°+30° angle to achieve it, or you can use two 60° angles to draw it. The triangle has two triangles, the two acute angles of the isosceles straight orange triangle are 45° and the right angle is 90°.

The thin baina has an acute angle of 30° and 60°, respectively, and a right angle of 90°. — 1 right angle and 2 acute angles on the triangular ruler.

Hurry up. 1. Use a triangular ruler to easily draw an integer multiple of 15°. In particular, a triangular ruler and a T-ruler can be combined to draw a series of vertical lines in a bottom-up order.

The brigade mill combines a T-ruler with a triangular ruler to draw an angle of °. Diagonal lines are usually drawn from left to right when drawing. With the triangular ruler of the two-belt chamber block and the T-shaped ruler, you can also draw a diagonal line of °.

2. With the cooperation of two triangular rulers, you can draw the parallel lines of any one of the drawing lines. 3. Two triangular rulers can draw angles of 135°, 120°, 150°, 75° and 105°.

I'm in a hurry. It can be achieved with a 90°+30° angle, or it can be drawn with two 60° angles.

With the right angle triangle 30 °, 60 ° of this painting, first draw a horizontal line break, with the right angle of the triangle side coincides with the line break, the vertex of the right angle side of the Hu Peng coincides with the right end of the line break, along the other right angle side of the triangle to draw a line can get a 90 ° right angle, and then use the 30 ° angle of the triangle to coincide with the side of 90 °, do the ridge vertex and the 90 ° angle of the vertex coincide to draw the line, the two angles add up to get a 120 ° angle.

Summary. Hello, glad to answer for you.

Just take the triangle and draw along the lines on both sides of the angle. It's exactly 30 degrees, 45 degrees, 90 degrees.

Use a triangular ruler to draw angles of 30 degrees, 45 degrees, and 90 degrees.

Hello, glad to answer for you. Just take the triangle and draw along the lines on both sides of the angle. It's exactly 30 degrees, 45 degrees, 90 degrees.

Just remember that the two lines are crossed at one point.

How to draw 135 degrees.

Draw 45 and 90 together.

How to draw 179 degrees.

Can't draw. Why.

You can't draw a triangle.

How to draw 115 degrees.

Can't draw. Sorry, wrong, 60-45 90

That's 105 degrees, not 115, look wrong.