Question

If an angle is 4/5 of its supplement ,calculate each angle

Answer 1

Answer:100 and 80

Step-by-step explanation:We know that supplementary angle means angles whose sum is 180.

Here x+4/5x=180

which means x=100 and 4/5x =80.

Answer 2

Angle be x and supplement angle be 180° - x

Therefore

x = 4/5 * (180-x)

5x = 720 - 4x

9x = 720

x = 80°

Therefore supplement angle = 180° - 80° = 100°