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Mathematics, 03.09.2021 07:20 emelylug033

cho hình chóp SABC . Gọi I, J lần lượt là trung điểm của AB và BC , Gọi K thuộc SC sao cho KC> KS . Tìm giao tuyến của hai mặt phẳng (IJK) và ( SAC)

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cho hình chóp SABC . Gọi I, J lần lượt là trung điểm của AB và BC , Gọi K thuộc SC sao cho KC> KS...
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