In a parallelogram abcd, ab=2bc, ad is produced both ways so that am=ad=dn. show that bn is peoendicular to cm


Since AP= PB = BC = AMand M = 1= 2So AMPBPCAgain AB= AN3 = 4Now from triangle MNO, BPO the third angle MON= POB and these are adjacent angle so Each of them is right angle.

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