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Mathematics 21 Online
OpenStudy (anonymous):

Given: D is the midpoint of CE

OpenStudy (anonymous):

so tired, i dont get proofs >.<

OpenStudy (kira_yamato):

|dw:1324261270010:dw| Angle BCD = Angle FED = 90˚ [R] BD = FD (given) [H] CD = DE (D is midpt of CE) [S] The triangles are congruent by RHS property

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