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Mathematics 10 Online
OpenStudy (anonymous):

Prove that the opposite angles of a parallelogram are congruent. http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_1004_04/image0154e985306.gif

OpenStudy (ybarrap):

x=y and w=z because distances of parallel lines between parallel lines are equal |dw:1377723929091:dw|

OpenStudy (ybarrap):

Two triangles are congruent because sides are congruent (SSS): |dw:1377724109775:dw|

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