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Thủ thuật CASIO: Cho hình chóp đều S.ABCD có đáy ABCD là hình vuông cạnh a,O là tâm đáy,SO=
1 month ago
35
Cho hình chóp đều S.ABCD có đáy ABCD là hình vuông cạnh a,O là tâm đáy,SO=a√3
Gọi M,N lần lượt là trung điểm của BC và CD.Khoảng cách giữa hai đường thẳng SA
và MN bằng
A.a (3√21)/14 B.a (3√21)/7 C.a ( √21)/14 D.a √3/√7
#HinhHocKhongGianOxyz
#HinhHocKhongGian
#ThuThuatCASIO
#ToanLop12
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