Question

An angle is double if its supplement then the measure of the angle is

Answer 1

Let the two angles be x and y

So,

x+y=180° ______ (1)

According to question, y=2x _____(2)

Putting (2) in (1)

x+2x=180°

3x=180°

x=60°

Now since y=2x

So y=2(60°)

y=120°

Hence 120° is the answer

Hope it helps...