Question

An exterior angle of a triangle is of measure 70° and one of its interior opposite angles is of measure 25°.Find the measure of the other interior opposite angle.​

Answer 1

Given : Exterior angle of triangle is 70°

One of its interior opposite angles is 35°

To Find :Find the measure of the other interior angle.

Solution:

Let the measure of the other interior angle be x .

Exterior angle property of triangle : The sum of measures of two opposite interior angles of triangles is equal the measure of exterior angle.

So,

35 + x = 70

x = 70 - 35

x = 35