Question

an angle is equal to 3 times of supplementary angle . what its measure ?

Answer 1

Let the angle be a

Supplementary angle = 180 - a

According to question,

a = 3 ( 180 - a)

=> a = 540 - 3a

=> 4a = 540

=> a = 135

Required angle = 135°

Answer 2

Supplementary angle = 180°
3 times of supplementary angle = 3*180° = 540°
Therefore, measure of an angle equal to 3 times of supplementary angle is 540°.