Triangle is mainly to remember these definitions, the sum of internal angles of triangle, the height of triangle, the classification of triangle, including the definitions of right triangle, obtuse triangle, acute triangle, equilateral triangle and isosceles triangle, which is not difficult, but mainly to understand and remember. Here are some triangular questions:

1, in the triangle, it is known that ∠ 1 = 62, and ∠ 2 = 108, and find ∠3.

2. In a right triangle, it is known that an acute angle is 75. What is the other acute angle?

3. It is known that the top angle of an isosceles triangle is 70, and how many degrees is each bottom angle?

It is known that the sum of the three sides of an isosceles triangle is 62 cm. If the length of a waist is 22 cm, find the length of its bottom.

As we all know, the base angle of isosceles triangle is 35. Find the degrees of the other two angles?