Chóp S. ABCD có đáy là vuông cạnh =4a. Các
mặt bên cùng tạo với đáy góc 45o
. Gọi M, N, P là...
Mathematics, 22.07.2021 18:10 Jojo3915
Chóp S. ABCD có đáy là vuông cạnh =4a. Các
mặt bên cùng tạo với đáy góc 45o
. Gọi M, N, P là trung
điểm SA, SB, SC. Lấy Q trên cạnh SD sao cho
SD=3SQ. Tính thể tích
a) Chóp S. MNP.
b) Khối đa diện SMNPQ
Answers: 2
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