How many degrees are the angles of a triangle?

There are two triangles in the triangle. The two acute angles of an isosceles right triangle are 45 and the right angle is 90. The acute angles of the slender triangular plate are 30 and 60 respectively, and the right angle is 90.

-A triangular ruler has 1 right angles and 2 acute angles.

The two acute angles of an isosceles right triangle ruler are both 45. Two identical isosceles right triangles can be made into squares or larger isosceles right triangles. The two right-angled sides of an isosceles right-angled triangular ruler are equal in length.

The acute angles of the long square are 30 and 60 respectively. Two identical slender Yangtze River Delta rulers can make a regular triangle. The length of the hypotenuse of the Yangtze River Delta ruler is twice the length of the short right angle side.

Extended data:

The purpose of the triangle:

1. It is convenient to draw an angle that is an integer multiple of 15 with a triangle.

2. Especially through the matching of triangle and T-square, a series of vertical lines can be drawn from bottom to top.

3. With the cooperation of two triangular plates, you can draw parallel lines of any straight line.

4. You can draw triangles directly: 30, 45, 60, 90.

5. Triangle is drawn with sum or difference:

( 1)45 -30 = 15 ;

(2)45 +30 =75 ;

(3)45 +60 = 105 ;

(4)45 +90 = 135 ;

(5)60 +60 = 120 ;