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[几何] 棱台中的一个问题

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zhangyi posted 2022-11-16 22:45 |Read mode

请问如果取DF的中点I，连接IG，能证明IG与AC垂直吗

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色k posted 2022-11-16 23:22

当然能啊，条件说了 AD=FC，那就是 ACFD 是等腰梯形，其上下底中点连线显然垂直于底。

这名字我喜欢

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