Question

1) AD is the median of a triangle ABC and O is the centroid such that AO = 10 cm. Length of OD (in cm)

Answer 1

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