Find the angles of the triangle.

Question

In triangle ABC, angle A is 20? greater than angle B, and angle C is twice the size of angle A. Find the angles of the triangle.

Answer 1

A=B+20

C=2A

A+B+C=180

A+(A-20)+2A=180

4A=200

A=50

B=30

C=100

 

As a check add them up besure they sum to 180.