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OpenStudy (anonymous):
Triangle ABC is shown below. Given: ∆ABC Prove: All three angles of ∆ABC add up to 180°. The flow chart with missing reason proves the measures of the interior angles of ∆ABC total 180°. Which reason can be used to fill in the numbered blank space? Definition of Supplementary Angles Substitution Definition of Complementary Angles Angle Addition Postulate
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OpenStudy (campbell_st):
no flow chart
OpenStudy (anonymous):
hold on
OpenStudy (anonymous):
OpenStudy (campbell_st):
isn't the missing statement... angle sum of a triangle...
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