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Mathematics 18 Online
OpenStudy (anonymous):

solve

OpenStudy (anonymous):

|dw:1375097424696:dw|

OpenStudy (anonymous):

in tringle abd and bdc ab=bc ad=dc and angle a = angle c so by SAS property triangle abd = triangle cbd hence angle adb = angle cdb angle adb+angle cdb = 180 angle adb = angle cdb = 90 hence right angle

OpenStudy (anonymous):

why ab=bc ad=dc and angle a = angle c

OpenStudy (amistre64):

show by geometry rules? or by any method?

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