Two angles of a quadrilateral are of measures 75 degree and 117 degree respectively and the other two angles are equal. Find the measure of each of the equal angles.
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Let the other 2 angles be x
therefore 75 + 117 + x + x = 360
192 + 2x = 360
2x = 360-192
2x = 168
x = 168/2
x = 84
both angles are 84°
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