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OpenStudy (anonymous):

A quadrilateral has angles that measure 87°, 69°, and 104°. * What is the measure of the fourth angle? A. 50° B. 80° C. 100° D. 120°

jabez177 (jabez177):

Add up 87 + 69 + 104 and what do you get?

OpenStudy (anonymous):

C

jabez177 (jabez177):

87 + 69 + 104 = 260

jabez177 (jabez177):

Now subtract 260 from 360 and what do you get?

jabez177 (jabez177):

Then that will be your answer.

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