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OpenStudy (anonymous):
The sum of 2 interior angles of this triangle is 140°. What is the measure of the third interior angle? A. 30° B. 70° C. 50° D. 40°
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OpenStudy (anonymous):
D
sam (.sam.):
The sum of all interior angles of a triangle is 180 degree,a triangle has 3 angles, so, 180 - 2sides = 40 degrees
OpenStudy (anonymous):
suppose,XYZ is a triangle.if x+y=140,then, x+y+z=180[the sum of all interior angles of a triangle is 180 degrees] 140+z=180[x+y=140] z=40 degrees.
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