Question

(4) In a AABC, angleA – angleB = 42°,
angleB - angleC = 21°, Find angleA, angleB and angleC.​

Answer 1

Answer:

angle A- angle B =42

angle A= 42+angle B

angle B- angle C=21

angle C= angle B-21

angle A+angle B+angle C=180

42+angle B+angle B+angle B-21=180

3 angle B+21=180

3 angle B=159

angle B=159/3=53