
Trung Tâm Luyện Thi Amsterdam Chương II-Bài 4.Hai Mặt Phẳng Song Song Với Mặt Phẳng
Lớp Toán Thầy-Diệp Tuân Tel: 0935.660.880
Bài tập 11. Cho hình chóp
là giao điểm của hai đường chéo
là tam giác đều. Mặt phẳng
và song song với mặt phẳng
.
Xác định và tính diện tích thiết diện của hình chóp cắt bởi
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