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圆锥底面半径怎么求
更新时间: 2020-10-29 00:00:00  

圆锥底面半径用公式S=πr²计算。圆锥是一种几何图形,其解析几何定义的:圆锥面和一个截它的平面(满足交线为圆)组成的空间几何图形叫圆锥。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。

另外圆锥的立体几何定义是:以直角三角形的直角边所在直线为旋转轴,其余两边旋转360度而成的曲面所围成的几何体叫做圆锥。旋转轴叫做圆锥的轴。垂直于轴的边旋转而成的曲面叫做圆锥的底面。不垂直于轴的边旋转而成的曲面叫做圆锥的侧面。无论旋转到什么位置,不垂直于轴的边都叫做圆锥的母线。

关键词: 圆锥 半径 怎么

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