If A, B, C are the points `(-1, 5), (3, 1), (5, 7)` respectively and D, E, F are the middle points of BC, CA and AB respectively, prove that : `DeltaABC=4 DeltaDEF`.

If A, B, C are the points (-1, 5), (3, 1), (5, 7) respectively and D, E, F are the middle points of BC, CA and AB respectively, prove that Area of DeltaABC=4 DeltaDEF .

The coordinates of A, B and C are (–1, 5), (3, 1) and (5, 7) respectively, D, E and F are the middle points of BC, CA and AB respectively. Calculate the area of the triangle DEF. (a)4 (b)3 (c)2 (d)8

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 .

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 .

If D,E and F are the middle points of the sides BC,CA and AB of the DeltaABC , then AD+BE+CF is

The coordinatea of A,B and C of the DeltaABC are (3,1), (9,7) and (-3,7) respectively. If D,E and F are the mid-point of the sides bar(BC),bar(CA)andbar(AB) respectively, then find the area of the DeltaDEF. Also show that DeltaABC=4DeltaDEF.

If D, E and F be the middle points of the sides BC,CA and AB of the DeltaABC , then AD+BE+CF is