Stages of solving problems and calculation problems
Answers are for parents and teachers.
1
The angles of a triangle are 3x, 4x and 5x. How many degrees is the largest?
75
2
A base angle of an isosceles triangle is 25°. Find its apex angle.
130
3
An exterior angle is 110° and one non-adjacent angle is 70°. How many degrees is the other?
40
4
Write the stages of solving a problem in order.
Understand, plan, solve, check.
5
Make up one calculation problem and solve it in the four stages.
The answer must fit the conditions and the diagram.