The angles in triangle are in the ratio of 2:2:4. Find the exterior angle adjacent to the largest angle. Find x.

Answer 1

2 + 2 + 4 = 8

180/8 = 90/4 = 45/2 = 22.5

Large angle = 22.5 x 4 = 90

Other two angles = 22.5 x 2 = 45

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.

Measure = 90