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What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radii and altitudes is 2: 1? submit
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Trong mặt phẳng toạ độ Oxy cho 3 điểm A(1;3) B(-1;4) C(-3;0). Tìm toạ độ chân đường cao AH của tam g...
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