Review: main theorems and problems
Answers are for parents and teachers.
1
The angles of a triangle are 2x, 3x and 4x. How many degrees is the smallest?
40
2
Two parallel lines are cut by a transversal; one corresponding angle is 65°. How many degrees is the other corresponding angle?
65
3
An isosceles triangle has legs 13 cm and perimeter 36 cm. How many cm is its base?
10
4
Write the four stages and explain one with an example.
Understand, plan, solve, check; for example, checking sees that the angle sum is 180°.
5
Pick the topic that seemed hardest and make up one problem on it.
Solve it and check it.