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Mathematics 71 Online
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? Alternate Exterior Angles Theorem Same-Side Interior Angles Corresponding Angles Postulate Alternate Interior Angles Theorem

OpenStudy (anonymous):

May someone please help me?

OpenStudy (turingtest):

|dw:1344195979007:dw|nice to have something to draw on...

OpenStudy (anonymous):

OHHH.. there's D... didnt see it before...

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