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D, E and F are respectively the mid-poin...

D, E and F are respectively the mid-points of the sides AB, BC and CA of a `Delta`ABC. Prove that by joining these mid-points D, E and F, the `Delta`ABC is divided into four congruent triangles.

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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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