Three angles of a quadrilateral have the following measures: 60, 90, and 125. what is the measure of the missing angle. 75, 80, 85, and 90

The Answer is 85. You can figure this out by adding up the angles given (60, 90, 125) to get 275. Because all angles in a quadrilateral add up to 360, you subtract the 275 from the 360 to get your answer on 85. Hope this helps!

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