Question

Three interior angles of a quadrilateral have measures of 120°, 100°, and 75°. What's the measure of the fourth interior angle? Question 1 options: A) 65° B) 100° C) 360° D) 70°

Answer 1

The answer is A.

Explanation:

Given that the total interior angles in a quadrilateral is 360°. So in order to find the 4th angle, you have to subtract the remaining angles from 360° :

`θ + 120 + 100 + 75 = 360`

`θ + 295 = 360`

`θ = 360 - 295`

`θ = 65`