Q19 of 177 Page 23

The two vectors and represent the sides and respectively of triangle ABC. Find the length of the median through A.



Let D be the point at which median drawn from A touches side BC.


Let be the position vectors of the vertices A, B and C.


So position vector of D =


So we creating a vector in the direction of AD


Position vector of D – position vector of A







So length of AD





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