If (2,1,3)(3,1,5) and (1,2,4) are the mid points of the sides BC ,CA, AB of `Delta ABC` respectively then the perimeter of `Delta ABC` is

If D(2,1,0) ,E(2,0,0) and F(0,1,0) are mid points of the sides BC,CA and AB of triangle ABC respectively, then the centroid of triangle ABC is

If (2,1),(-1,-2),(3,3) are midpoints of sides BC,CA,AB of Delta ABC then the equation of AB is

If D(3,-2) , E(-3,1) and F(4,-3) are the mid-points of the sides BC, CA and AB respectively of Delta ABC , find the co-ordinates of point A , B and C .

If the mid points of the sides AB and AC of a triangle ABC are (3,5),(-3,-3) then the length of the side BC is

If D,E,F are the mid points of the side BC,CA and AB respectively of a triangle ABC,write the value of vec AD+vec BE+vec CF

Thevertices of a triangle ABC are A(-7, 8), B (5, 2) and C(11,0) . If D, E, F are the mid-points of the sides BC, CA and AB respectively, show that DeltaABC=4 DeltaDEF .