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2015-10-31T09:27:43+05:30

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Centroid divides the median in the ration 2:3 from the vertex. AO = 10 which is equal to two-third the median. therefore the median is 15cm. AD = AO + OD.
therefore OD = AD - AO = 15-10 = 5.
therefore the length of OD is 5cm
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