柚子肉柚子肉
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@純愛neko_
2024-09-19 13:42
原文

已知三角形△ABC AB＝25 AC＝18 sin∠BAC＝0.2 过AB中点K 作KF⊥AB交AC于F ，连接中点K及三角形顶点C，得三角形KFC，求证KFC=V我50

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