Question

The exterior angle at C of ABC is equal to 120°. Find the measure of all the angles
of the triangle if A = B. What type of triangle is this?​

Answer 1

Answer:

equilateral...

60+A+B=180

ALL ANGKES ARE 60

Answer 2

Answer:

A+B=120

A+A=120

2A=120

A=60

then by using triangle sum property

A+B+C=180

60+60+C=180

120+C=180

C=180-120

C=60

All angles are equal so the tringle is equilateral