[" 7.In aABC,the coondinates of vertex A are "(2,-1)" and "D(1,0)" and "E(2,1)" respectively,"],[" the mid points of the sides "AB" and "AC" .If "F" is the mid point of side "BC" ,find the area of "],[" ADEF."]

In Fig.ABC is a triangle co-ordinates of whose vertex A are (0,-1). D and E respectively are the mid-points of sides AB and AC their co- ordinates are (1,0) and (0,1) respectively.If F is the mid-point of BC find the areas of /_ABC and /_DEF

In Delta ABC, D, E, F are respectively the mid points of the sides AB, BC and AC. Find ratio of the area of Delta DEF and area of Delta ABC .

D,E and F are respectively the mid-points of sides AB.BC and CA of /_ABC. Find the ratio of the areas of /_DEF and /_ABC .

D, E and F are respectively the mid-points of sides AB, BC and CA of DeltaABC . Find the ratio of the areas of DeltaDEF" and "DeltaABC .

D,Eand F are respectively the mid - points of sides AB, BC and CA of DeltaABC . Find the ratio of the areas of DeltaDEF and DeltaABC.

D, E and F are respectively the mid¬ points of the sides BC, CA and AB of triangleABC . Determine the ratio of the areas of triangles DEF and ABC.

D, E and F are respectively the mid-points of sides AB, BC and CA of Delta ABC . Find the ratio of the areas of Delta DEF and Delta ABC .

E is the mid-point of side AB and F is the mid point of side DC of parallelogram ABCD . Prove that AEFD is a parallelogram.

D, E and F are respectively the mid-points of sides AB. BC and CA of triangleABC . Find the ratio of the areas of triangleDEF and triangleABC .