anonymous
  • anonymous
the sum of the measure of the interior angle of a triangle is equal to_____. A. 90 B.180 C.270 D.360
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Jadeishere
  • Jadeishere
So all 3 interior angles in a triangle add up to 180 >.< I don't actually know why, though >.< @Elsa213
Michele_Laino
  • Michele_Laino
hint: the sum S of internal angles of a polygon is given by the subsequent formula: \[\Large S = \left( {n - 2} \right) \times 180\] where n is the number of sides of our polygon. In our case we have a triangle, so, n=3
Michele_Laino
  • Michele_Laino
then, after a substitution, we get: \[\Large S = \left( {n - 2} \right) \times 180 = \left( {3 - 2} \right) \times 180 = ...?\]

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anonymous
  • anonymous
90 is the answer

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