Q14 of 113 Page 128

In Fig. 5.14, POQ is a line. If x = 30°, then ∠QOR is

∠ POS, ∠ SOR & ∠ ROQ forms a linear pair


x + 5y = 180°


⇒ 5y = 150°


⇒ y = 30°


∠QOR = 3y


⇒ ∠QOR = 90°

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