Question

an exterior angle of a triangle is 120 and the two interioer opposite angle are equal what is the measure of each of these anglea?

Answer 1

Answer:

Step-by-step explanation:

1.We know exterior angle is sum of two interior angles.

2.It is given that interior opposite angles are equal ,let the two angle be x.

According to question

x+x=120°

2x=120°

x=60°

Third angle is (180°-60°-60°)=60°

Hence the triangle is equilateral triangle