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圓錐表面積:設底面圓半徑為R,圓錐高為H,母線為l(側面展開圖為扇形半徑)因l=Sqrt(R^2+H^2)則有側面積=πRl全面積=πR(l+R)圓錐體積V=1/3Sh S是圓錐的底面積,h是圓錐的高,r是圓錐的底面半徑棱柱體積:設棱…
正方形是邊長的平方 立方體是6×邊長的平方
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