Q28 of 153 Page 148

In ΔABC, if ∠A + ∠B = 125° and ∠A + ∠C = 113°, then ∠A = ?

A + B + C = 180

C = 180 – 125 = 55^o

A + C =113^o

A =113 – 55 =58^o

In the given figure, x = ?

If 3∠A = 4∠B = 6∠C, then A : B : C = ?

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

In ΔABC, side BC is produced to D. If ∠ABC = 40° and ∠ACD = 120°, then ∠A = ?