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English 13 Online
OpenStudy (anonymous):

Which undefined terms are needed to define parallel lines?

OpenStudy (tanya123):

Coplanar, line Parallel lines are coplanar lines that do not intersect.

OpenStudy (adrynicoleb):

Hi :) Next time, you might want to put this in the math section. http://openstudy.com/study#/groups/Mathematics Welcome to OS~

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