Question

Two angles of a Quadrilateral each measure 80.
A third angle of the Quadrilateral measures 115.
What is the measure of the fourth angle?
A. 65
B. 85
C. 95
D. 100

Answer 1

hint :
sum of them = 360

Answer 2

A quadrilateral's sum of interior angles has a measure of 360 degrees.
Since 2 of the angles measure 80 degrees and another measures 115 degrees,

360-2(80)-115 = 85 degrees.

Answer 3

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