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How to do this sum from 9th grade

Answer»

-step explanation:GIVENAB PARALLEL CDO IS MID POINT OF ADPROOFOA =OD (given)COD=AOB(vertically opposite angle)DCB=CBA,(alternate INTERIOR angle)since triangleAOB CONGRUENT TRIANGLE DOCOC=OB(CPCT)HENCE O IS MID POINT OF BCHENCE PROVEDHOPE THIS HELPS YOU



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