Người ta cắt miếng bìa hình tam giác cạnh bằng 10...
Câu hỏi: Người ta cắt miếng bìa hình tam giác cạnh bằng 10 cm như hình bên và gấp theo các đường kẻ, sau đó dán các mép lại để được hình tứ diện đều. Tính thể tích của khối tứ diện tạo thành.![](data:image/png;base64,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)
A. \(V = \frac{{250\sqrt 2 }}{{12}}{\rm{c}}{{\rm{m}}^3}.\)
B. \(V = 250\sqrt 2 {\rm{c}}{{\rm{m}}^3}.\)
C. \(V = \frac{{125\sqrt 2 }}{{12}}{\rm{c}}{{\rm{m}}^3}.\)
D. \(V = \frac{{1000\sqrt 2 }}{3}{\rm{c}}{{\rm{m}}^3}.\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề trắc nghiệm ôn thi học kì 1 môn Toán lớp 12 năm 2018 - 2019 có lời giải - Đề số 5