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圆锥的母线长和弧长有何关系

更新时间: 2020-10-28 00:00:00     

二者关系:圆锥侧面弧长等于圆锥体底面圆的周长,把一个圆锥的侧面展开,得到一个扇形,这个扇形的弧长等于圆锥底面的周长,而扇形的半径等于圆锥的母线的长,圆锥的侧面积就是弧长为圆锥底面的周长,圆锥有一个底面、一个侧面、一个顶点、一条高、无数条母线,且底面展开图为一圆形,侧面展开图是扇形。

关键词: 圆锥 母线 关系

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