How do you count eight corners when two triangles are put together?

Hello, two triangles put together, didn't say that you can't put the small one inside the big one, put the small triangle.

Put the angle of 30 degrees into the angle of 90 degrees, so that the two corners cross, you can count six angles, and then add the remaining two angles that do not cross, a total of eight angles, Wang.

Put the 5th angle together with the 6th angle, which is vertex to vertex, and then form two angles, which are 7 angles and 8 angles.

What triangles are put together, you can count the eight corners like this, two right angles. Five acute angles. A flat angle.

It's misplaced. You move that little triangle up.

One of the corners is fine, and then there is an extra corner.

Sharp-to-sharp spelling should work.

Spell out right angles.

A triangular ruler has only four angles, and two triangular rulers can spell out an infinite number of angles, all of which are multiples of 15° angles.

1. You can draw a ° directly.

2. Draw by sum or difference: 45°-30°=15°; 45°+30°=75°；45°+60°=105°；45°+90°=135°；90°+30°=120°；90°+90°=180°；60°+90°=150°。

So you can spell out the angle of °.

The diagram shows a right-angled triangle: there are two cases, there are ordinary right-angled triangles, and there are isosceles right-angled triangles (special cases) In a right-angled triangle, the two sides adjacent to the right angle are called right-angled edges, and the edges opposite by right-angled angles are called hypotenuses. The sides of a right triangle are also called "chords".

If the two right-angled sides are not the same length, the short side is called the "hook" and the long side is called the "strand".

Yes. It can be put together at two right angles.

Mapping applications for triangles.

1. Use a triangular ruler to easily draw the angle of 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. Combining a T-ruler with a three-key ruler allows you to draw an angle of °.

Diagonal lines are usually drawn from lead to left to right. You can also draw a diagonal line of ° with two triangular rulers in conjunction with a T-ruler.

2. With the cooperation of two triangular rulers, you can draw the parallel lines of any drawing line.

3. Two triangular rulers can be pieced together to draw angles of 135°, 120°, 150°, 75° and 105°.

Features of the triangular ruler

There is 1 right angle and 2 acute angles on the block triangular ruler.

Both acute angles of the isosceles right-angle triangular ruler are 45°. 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.

The acute angles of the slender triangular rulers are 30° and 60°, respectively. 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.

11 different corners can be spelled out with a pair of triangles from Ji Hexiang.

Explanation and analysis: Because a pair of triangles has two triangles, an equilateral triangle and a right-angled triangle, there are a total of 45 degrees, 45 degrees, 90 degrees, 30 degrees, 60 degrees, 90 degrees, 6 angles, set these six angles, you can spell out:

90 = 120 degrees

90 = 150 degrees

45 = 75 degrees

45 = 105 degrees

90 = 180 degrees

45 = 135 degrees.

6 angles, combined with the original 5 angles of 45 degrees, 90 degrees, 30 degrees, 60 degrees, and 90 degrees, there are a total of 11 angles.

With a pair of triangles, you can spell out 11 different corners.

Explanation and analysis: Because a pair of triangles has two triangles with Xiaotong, an equilateral triangle and a right-angled triangle, there are a total of 45 degrees, 45 degrees, 90 degrees, 30 degrees, 60 degrees, 90 degrees, 6 angles, set these six angles, you can spell out:

90 = 120 degrees

90 = 150 degrees

45 = 75 degrees

45 = 105 degrees

90 = 180 degrees

45 = 135 degrees.

The 6 angles, combined with the existing 5 angles of 45 degrees, 90 degrees, 30 degrees, 60 degrees, and 90 degrees, make a total of 11 angles.

A pair of triangles includes: 2 90 degrees, 60 degrees, 30 degrees, 45 degrees, can be spelled out by the corner or degree is 15 degrees, 30 degrees, 45 degrees, 90 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, 180 degrees.

In our modern society, the triangle board (English set square) is one of the main drawing tools for learning mathematics and quantitative angles. Each pair of triangles consists of two special right-angled triangles. One is an isosceles right-angled triangle plate, and the other is a right-angled triangle plate with special angles (hereinafter referred to as a thin triangle plate).

A pair of triangles includes a protractor, an isosceles right triangle, a ruler, a thirty and sixty degree right triangle.