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Mathematics, 19.06.2021 03:20 lizzyboo32

Cho hình lăng trụ ABCA'B'C' có đáy là tam giác đều cạnh =2 biết A'A=A'B=A'C tính khoảng cách từ A' đến (ABC)

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Cho hình lăng trụ ABCA'B'C' có đáy là tam giác đều cạnh =2 biết A'A=A'B=A'C tính khoảng cách từ A' đ...
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