In a triangle ABC, two angles A and B are equal. If the exterior angle at ∠A = 115°, find the measure of ∠C.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 50°.
We know that
Interior angle + exterior angle = 180°
The interior angle of ∠A = 180° - 115° = 65°
⇒ ∠A = ∠B = 65°
⇒ ∠C = 180° - 65° - 65° = 50°