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Mathematics 8 Online
OpenStudy (anonymous):

Write an indirect proof to show that opposite angles of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures. This figure does not need to be submitted.

OpenStudy (cwrw238):

|dw:1398531346658:dw|

OpenStudy (cwrw238):

by definition opposite sides of a parallelogram are parallel use the fact that alternate angles are equal |dw:1398531456437:dw|

OpenStudy (cwrw238):

angles marked x are congruent

OpenStudy (anonymous):

thanks

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