Question

an angle is doubled of its supplement then the measure of the angle is​

Answer 1

Consider that angle as 2x.

2x+x=180

3x=180

x=60°

The measure of angle is of 120°.

Answer 2

Let '2x' be the angle and 'x' its supplement.

We know that 2 angles which are supplements of each other, then their sum = 180°

⇒ 2x + x = 180°

3x = 180°

x = 180/3 = 60°

∴ The measure of the angle = 2x = 2 × 60 = 120°

HOPE THIS HELPS ^_^