The figure below shows quadrilateral ABCD. What is the measure of ∠C

The figure below shows quadrilateral ABCD. What is the measure of ∠C ?

1. 120°
2. 115°
3. 105°
4. 100°
5. 80°

Answer

The correct answer is A.

The sum of the measures of all four interior angles in any quadrilateral is always 360°.

The given three angle measures add up to 65° + 100° + 75° = 240°, so the missing angle measure is 360° - 240° = 120°.