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Mathematics 20 Online
OpenStudy (anonymous):

@OOOPS

OpenStudy (anonymous):

Prove that opposite angles of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures.

OpenStudy (anonymous):

hey, I did it

OpenStudy (anonymous):

let me check where it is

OpenStudy (anonymous):

|dw:1420941994863:dw|

OpenStudy (anonymous):

do the same if you link AC

OpenStudy (anonymous):

okay so I write ABD=DCB, hence angle A= angle C

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