Q. 295.0( 3 Votes )

In ΔABC, if A – B = 42° and B – C = 21°, then B = ?
A. 95°

B. 53°

C. 32°

D. 63°

Answer :

A = B + 42


C = B – 21


A + B + C = 180


B + 42 + B + B – 21 =180


3B + 21 = 180


3B = 159


B =

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