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	Các bình luận về: Đề bài: Cho tứ diện $ABCD$ có $AD\bot mp(ABC), AC=AD=4cm, AB=3cm, BC=5cm$. Tính khoảng cách từ $A$ đến $mp(BCD)$	</title>
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	<description>Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online</description>
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