Question

A quadrilateral has angles that measure 74°, 93°, and 117°.



What is the measure of the fourth angle?


A.
76°


B.
104°


C.
106°


D.
284°

Answer 1

The answer is A. 76°.
The sum of the angles in a quadrilateral equals 360°.
Let the unknown angle be x.
The sum would be:
x+74°+93°+117°=360°
x+284°=360°
x=360°-284°
x=76°