Q10 of 153 Page 113

Find the angle which is five times its supplement.

150°


Let the angle = X


Supplement of X = 180° – X


According to question,


⇒ X = 5(180° – X)


⇒ X = 900° - 4X


⇒ X + 5X = 900°


⇒ 6X = 900°


⇒ X = 150°


Therefore angle = 150°


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