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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°
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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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