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`.

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 .

A=(2,2) , B=(6,3) , C=(4,1) are the vertices of triangle. If D , E are the mid points of BC , CA respectively, then DE =

A=(2,2),B=(6,3),C=(4,1) are the vertices of triangle.If D,E are the mid points of BC,CA respectively,then DE