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Câu 7:

Cho tứ diện ABCD . Vẽ $A H \perp(B C D)$

Câu 7: Cho tứ diện ABCD . Vẽ AH⊥(BCD)A H \perp(B C D)AH⊥(BCD). Biết H là trực tâm tam giác BCD . Khẳng định nào sau đây không sai?

Thông tin câu hỏi

Câu 7:

Cho tứ diện ABCD . Vẽ $A H \perp(B C D)$ . Biết H là trực tâm tam giác BCD . Khẳng định nào sau đây không sai?