If 45° and 65° are the angles of a triangle, then find the exterior angle of the third angle (remaining angle).
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 110°.
In a triangle, the sum of the interior angles is always 180∘
Given two angles, 45∘ and 65∘,
Third angle = 180° - (45° + 65°)
⇒ 180° - 110° = 70°
The exterior angle is equal to the supplement of the interior angle.
Therefore,
The exterior angle = 180 - 70 = 110°
Thus, the exterior angle of the third angle is 110°