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The vertices of the triangle ABC are (3,...

The vertices of the triangle ABC are (3,0), B (0,6) and C (6,9). The sides `bar(AB)andbar(AC)" of "DeltaABC` are intersected by `bar(DE)` at D and E respectively into a ratio of `1:2` Prove by coordinates geometry that ``DeltaABC=9DeltaADE.`

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