Question

In `DeltaA B C`, D, E and F are respectively the mid-points of sides AB, BC and CA. Show that `DeltaA B C`is divided into four congruent triangles by joining D, E and F.

Answer 1

B is midpoint of AC
AB=BC
BG||CF
L||M||N
G is midpoint on side AF
`/_ADF` G is mid point
GE||AD
E is midpoint on FD.