Cho hình lăng trụ đều ABC.A’B’C’có tất cả các cạnh...
Câu hỏi: Cho hình lăng trụ đều ABC.A’B’C’có tất cả các cạnh bằng a (tham khảo hình vẽ bên). Gọi M là trung điểm của cạnh BC. Khoảng cách giữa hai đường thẳng AM và B’C là:![](data:image/png;base64,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)
A. \(\frac{{a\sqrt 2 }}{2}\)
B. \(\frac{{a\sqrt 2 }}{4}\)
C. a
D. \(a\sqrt 2 \)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPTQG năm 2018 môn Toán Chuyên ĐH Sư Phạm Hà Nội