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OpenStudy (anonymous):
Prove that the sum of the measures of the interior angles of a triangle is 180°. Be sure to create and name the appropriate geometric figures.
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OpenStudy (anonymous):
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OpenStudy (littlebird):
It might help to know that the sum of the interior angles of a shape is 180(n-2) where n is the number of sides. Triangle: 180(3-2)=180
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