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A quadrilateral has angles that measure 68°, 81°, and 90°. What is the measure of the fourth angle?
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A quadrilateral has angles that measure 68°, 81°, and 90°. What is the measure of the fourth angle?

User ATNASGDWNGTH
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121, you find the angle by adding the other three angles then subtracting the result from that, from 360, 68+81+90=239 360-239=121.
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User Dhabensky
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