Seudónimo Seudónimo

31-10-2016
Mathematics

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A quadrilateral has angles that measure 63°, 89° and 121°. What is the measure of the fourth angle? A. 273° B. 93° C. 87° D. 27°

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TooNashty TooNashty

31-10-2016

The answer is C. 87.
360 - (63 + 89 + 121) = 87

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kingdonald1 kingdonald1

31-10-2016

A quadrilateral is 4 sided, which means the total degrees is 360. Add total given degrees and subtract from 360. 273 from 360=87

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