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| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 04:56, 19 May 2024 | Triangle area ratio lemma.jpg (file) |  |
22 KB | If in a $\triangle ABC, D,E$ and $F$ are on $AB, BC, AC$ such that $AD:DB=1:a, BE:EC=1:b$ and $FC:FA=1:c$ Then $[DEF]=\left|\frac{[ABC](1+abc)}{(1+a)(1+b)(1+c)}\right|$ | 1 |
