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	Các bình luận về:  Cho hình chóp\(S.ABCD\)có đáy\(ABCD\)là hình thoi nhưng không là hình vuông,\(AB = SA = SB = SD = a\). Biết rằng thể tích khối chóp bằng\(\frac{{{a^3}\sqrt 2 }}{6}\), khi đó góc giữa hai mặt phẳng\(\left( {SBC} \right)\)và\(\left( {SCD} \right)\)là	</title>
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