D, E and F are the mid-points of the sides AB, BC and CA of the `DeltaABC`. Prove that `DeltaDEF=1/4DeltaABC`.

In the adjoining figure D, E and F are the mid-points of the sides BC, CA and AB of the equilateral DeltaABC. Prove that DeltaDEF is also an equilateral triangle.

In the adjoining figure D, E and F are the mid-points of the sides BC, CA and AB of the equilateral DeltaABC. Prove that DeltaDEF is also an equilateral triangle.

D, E and F are the mid-points of the sides AB, AC and BC of the DeltaABC. Prove that DE and AF bisects each other.

D, E and F are the mid-points of AB, BC and CA of the equilateral DeltaABC. Prove that DeltaDEF is also an equilateral triangle.

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

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

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

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

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

If E, F and G are the mid-points of the sides AB, BC and CA of the DeltaABC respectively, then prove that the centres of gravity of DeltaABC and DeltaEFG are the same point.