In DeltaA B C, D, E and F are respective...

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.

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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
...

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