Harmon Hammond
02/16/2024 · High School
\( S . A B C D \). Gọi \( I, J, K \) lần lượt là trọng tâm của các tam giác \( A B C, S B C \) và \( S A C \). Trong các khẳng định sau, khẳng định nào đúng? A. \( (I J K) / /(S D C) \). B. \( (I J K) / /(S A C) \). C. \( (I J K) / /(S B C) \)
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Khẳng định B: \( (IJK) \perp (SAC) \) là đúng.
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