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設腰長為x則底邊長為2p-2x;旋轉後就是兩個圓錐體單個圓錐體的高度h等於底邊的一半=p-x;而圓錐體的底面圓半徑R等於三角形底邊上的高等於根號下(x^2-(p-x)^2)根據圓錐體積公式1/3 S*h於是幾何體的體積V=2/3…
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