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OpenStudy (anonymous):
Connor drew a quadrilateral and measured the interior angles. There is a 70° angle, a 47° angle, and a 98° angle. What is the measure of the fourth angle?
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OpenStudy (ybarrap):
sum of the angles of a quadrilateral must equal 360- http://en.wikipedia.org/wiki/Quadrilateral
OpenStudy (anonymous):
thanks its correct !
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