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Mathematics 14 Online
OpenStudy (anonymous):

To prove that two lines cut by a transversal are parallel, one must show that

OpenStudy (cwrw238):

|dw:1334095906147:dw|

OpenStudy (cwrw238):

two angles marked x are equal (alternate angles)

OpenStudy (anonymous):

interior or exterior ?

OpenStudy (shayaan_mustafa):

interior

OpenStudy (cwrw238):

thats not the only way equal corresponding angles also constitute a proof |dw:1334096185117:dw|l

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