��现梯形上下底的中点连结成的线和梯形的两条对角线交于一点，但是如何证明？ 知乎 Sketch Coloring Page

��现梯形上下底的中点连结成的线和梯形的两条对角线交于一点，但是如何证明？ 知乎 Template

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tomski��现梯形上下底的中点连结成的线和梯形的两条对角线交于一点，但是如何证明？ 知乎 coloring

��现梯形上下底的中点连结成的线和梯形的两条对角线交于一点，但是如何证明？ 知乎 sketch template

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