If a triangle is 180 degrees. Angle A is x2 as large as angle B; angle B is 4 degrees larger than angle C. What is measure of each angle

Question

Cannot figure out how to start problem.

Answer 1

A + B + C = 180°

2B + B + C = 180°

3B + C = 180°

 

3(C+4) + C = 180°

3C + 12 + C = 180°

4C = 168°

C = 42°

 

B = C + 4 = 42 + 4 = 46°

A = 2B = 2*46° = 92°

 

Check:

     A + B + C = 180°

     42^o + 46^o + 92^o = 180°

     180° = 180°

     Check!