Question

Trisha's desktop is a quadrilateral. Three of the angles are 77°, 80°, and 85°.

What is the measure of the fourth angle?
A.
58°
B.
158°
C.
118°
D.
258°
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Answer 1

c) 118 degrees

Explanation:

First you add up all the angles which is 242 and then you subtract 360-242 to get an answer of 118.