Home > Shapes > Geometry
| T-N-T (Posted on 2017-11-25) |
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Let ABC be an arbitrary triangle with points D, E, and F
lying on rays AB, BC, and CA respectively such that
AD/AB = BE/BC = CF/CA = x.
Prove that Area(ΔDEF)/Area(ΔABC) = 3x2 - 3x + 1.
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