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

Answer:

The answer is A.

Step-by-step 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° :

$θ + 120 + 100 + 75 = 360$

$θ + 295 = 360$

$θ = 360 - 295$

$θ = 65$