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Mathematics 15 Online
OpenStudy (anonymous):

Use a paragraph proof to prove the alternate interior angles theorem. Given: Line AB ll CD Prove: Alternate interior angles are congruent

OpenStudy (anonymous):

OpenStudy (anonymous):

@dpaInc

OpenStudy (anonymous):

@zepp ?

OpenStudy (zepp):

This might be helpful, http://www.youtube.com/watch?v=svprkO5bM88 It's a 4 minutes long video showing the proof :)

OpenStudy (anonymous):

Im still confused a little :/

OpenStudy (zepp):

Which part?

OpenStudy (anonymous):

nvm i think i got it thanks zepp

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