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thinh_ha25
2 năm trước
Tứ diện ABCD có E, F lần lượt là trung điểm của BC, CD. a) Tìm giao tuyến (ABF) giao (ADE)=? b) Gọi M thuộc (ACD), (ABD) giao (BCM)=? Ai biết làm giải giúp mình vs ạ
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