如何证明抛物线上一点的焦半径绕焦点扫过的面积等于这点到准线垂线段扫过面积的一半？ 知乎 Sketch Coloring Page

如何证明抛物线上一点的焦半径绕焦点扫过的面积等于这点到准线垂线段扫过面积的一半？ 知乎 Template

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tomski如何证明抛物线上一点的焦半径绕焦点扫过的面积等于这点到准线垂线段扫过面积的一半？ 知乎 coloring

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如何证明抛物线上一点的焦半径绕焦点扫过的面积等于这点到准线垂线段扫过面积的一半？ 知乎 sketch template

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