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Geometry 9 Online
OpenStudy (3_pointmaster):

Prove theorem 5-7. If two lines are parallel to the same line, then they are parallel to each other. Given: line AB perpendicular to line CD AND line EF perpendicular to line CD. prove: line AB IS PERPENDICULAR TO LINE EF

jhonyy9 (jhonyy9):

try make a drawn

OpenStudy (3_pointmaster):

What??

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