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A quadrilateral has angles that measure 60°, 95°, and 150°. What is the measure of the fourth angle? A. 25° B. 55° C. 85° D. 125°
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A quadrilateral has angles that measure 60°, 95°, and 150°.

What is the measure of the fourth angle?

A.
25°

B.
55°

C.
85°

D.
125°

User BobC
by
5.5k points

1 Answer

2 votes
The sum of all angles of a quadrilateral is equal to 360º.

x=fourth angle;
Therefore:

x+60º+95º+150º=360º
x=360º-60º-95º-150º=55º

Answer: B. 55º
User Optical Phoenix
by
5.5k points
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