Question

please refer to the attachment and answer the question with proper working please​

Answer 1

Answer:

angle B = 40°

Step-by-step explanation:

angle A - angle B = 80°

A = 80°+B

angle B - angle C = 20°

B = 20 + C

sum of triangle is 180°

A +B+ C =180°

80+ B + 20 + C + C = 180° , ( B= 20+C )

120 + 3C = 180°

C = 20°

B= 20 +C

B = 40°