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Mathematics 9 Online
OpenStudy (anonymous):

this is 11

OpenStudy (studygurl14):

StudyGurl14 here. :)

OpenStudy (anonymous):

11

OpenStudy (studygurl14):

Sides BC and EC are congruent, as given. In addition, it is given that sides AC and DC are congruent. Angles BCA and ECD are congregant because of the reflexive property. Triangles BCA and ECD are congruent by SAS. That means sides BA and ED have to be congruent by CPCTC

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