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Câu 22:

Cho tứ diện $ABCD$

Câu 22: Cho tứ diện ABCDABCDABCD có trọng tâm GGG. Mệnh đề nào sau đây sai?

Thông tin câu hỏi

Câu 22:

Cho tứ diện $ABCD$ có trọng tâm $G$ . Mệnh đề nào sau đây sai?