Question

If ABC are three angles of a triangle. If A-B = 13 and B-C = 50 . Then find angels ABC

Answer 1

sum of all angles in a triangle is equal to 180°.

A+B+C=180

A-B=13

A=13+B

B-C=50

C=B-50

13+B+B+B-50=180

3B+13=230

3B=217

B=217/3

A=13+217/3

C=217/3-50