Question

A side of a triangle below has extended to form an exterior angle of 135 degrees. find the value of x.

Answer 1

Answer: x = 18 degrees

The sum of all the interior angles = to the exterior angle

The interior angles agiven are Exterior angle = 135 degrees

Applying the above theorem

x + 117 = 135

Make x the subject of the formula

x = 135 - 117

x = 18 degrees