If the length of medians `A A_(1),BB_(1)` and `C C_(1)` of `triangle ABC` are `m_(a),m_(b)` and `m_(c)` respectively, then:

If the coordinates of the vertices of triangle ABC are (-1,6),(-3,-9) and (5,-8) respectively,then find the equation of the median through C.

If m_(a),m_(b),m_(c) are lengths of medians through the vertices A,B ,C of triangle ABC respectively, then length of side C=

Consider /_ABC and /_A_(1)B_(1)C_(1) in such a way that bar(AB)=bar(A_(1)B_(1)) and M,N,M_(1),N_(1) be the midpoints of AB,BC,A_(1)B_(1) and B_(1)C_(1) respectively,then

If G_(1),G_(2) are centroids of triangles A_(1),B_(1),C_(1) and A_(2),B_(2),C_(2) respectively, then bar(A_(1)A_(2))+bar(B_(1)B_(2))+bar(C_(1)C_(2)) =