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[几何] 正方形

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chudengshuxue Posted at 2022-4-18 15:09:03 |Read mode

Last edited by hbghlyj at 2025-3-21 04:53:40如图，正方形 $A B C D$ 的边长为 $1$, $E$ 为 $B C$ 上一动点，$D F \perp A E$ 于点 $F$，则 $E F$ 的最小值为

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kuing Posted at 2022-4-18 15:23:52

涉三次方程，无简单解，扔掉。

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