Question

The measure of an angle is twice the measure of its supplementary ang Find its measure.

Answer 1

Given that

The angle measure of an angle is twice of the measure of the supplementary angle.

Let the angle measured will be ‘x’ say

∴The supplementary angle of  x is 180 - x as per question

x° = 2 (180 - x)°

 x° = 2 (180°) - 2x°

⇒ 3x° = 360°

⇒ x° = 120°

∴ The angle measured is 120°.