Question

find the angle which is twice its supplement?

Answer 1

Let one supplement angle=x
Twice of supplement angle=2x
so we know two supplement angle =180°
Then
x+2x=180°
3x=180°
x=180÷3=60°
2×60=120°

Answer 2

In this solution, the one supplement angle is taken by X and twice of supplement angle is 2X.

So that it remains two supplement that is measured by angle at 180 degree and then consider it as X x+2x=180°, 3x=180°, x=180÷3=60°, 2×60=120°.

Therefore, two supplement angles takes place by 180 degree.