Question

In a ΔABC, if ∠A - ∠B = 42° and ∠B - ∠C = 21°, then ∠B is

Answer 1

Answer:

53°.................................

Answer 2

Answer:

B = 53

Step-by-step explanation:

A +B + C = 180

( A = 42 + B ) ,( B = C + 21 )

SO,( A = 42+21 +C )

( A = 63+C)

63 + C + C +21 + C = 180

3C + 84 = 180

3C = 180 - 84

3C = 96

C = 32

SO,B = C +21 = 32+21

= 53

A = 42+B = 42+ 53

= 95