Question

if two angles are supplymeantry and one angle is double the other,then the large angle is
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Answer 1

let one angle be x°

let the other angle be 2x°

as we know sum of supplementary angles is 180°

then A.T.Q

x°+2x°=180°

= 3 x°=180°

x°= 60°

2x°= 120°

hence , 120° is the correct answer .(ans. double of the other angle is the large one and its value is 120°