Question

find the angles in each of the following number one the angles are supplementary and the larger is 20 degree less than three times the smaller

Answer 1

let the smaller angle be x

larger angle is 3x - 20

x + 3x - 20 = 180

4x - 20 = 180

4x = 180 + 20

4x = 200

x = 200/4

x = 50

smaller angle = 50

larger angle is 3x - 20

= 3 × 50 - 20

= 150 - 20

= 130