# What is the third angle of a triangle is the other angles are 36 and 108?

Nov 8, 2016

$\angle C = {36}^{\circ}$

#### Explanation:

$\angle C = {180}^{\circ} - \angle A - \angle B$

$\angle C = {180}^{\circ} - {36}^{\circ} - {108}^{\circ}$

$\angle C = {36}^{\circ}$

The triangle must be isosceles, because it has two equal angles.