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One angle of a non-regular quadrilateral is a right angle. The largest angle is 3 times the size of the smallest angle. The fourth angle is 15 degrees greater than the smallest. What is the measure, in degrees, of the largest angle?

 May 31, 2023
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quadrilaterals have a sum of the angles equaling 360

one angle is 90, the smallest is x, the largest is 3x, and the fourth is x+15

105+5x=360

x=51

thus the largest angle is 153

 May 31, 2023

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