一个圆锥的侧面展开图是半径为8 cm，圆心角120°的扇形，则此圆锥底面半径是( )。

作者: tihaiku 人气: - 评论: 0

问题一个圆锥的侧面展开图是半径为8 cm，圆心角120°的扇形，则此圆锥底面半径是( )。

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答案 B

解析由圆锥侧面展开图的半径和圆心角可得出扇形的弧长，扇形的弧长则为底面圆的周长，

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位置: 第 85 行

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一个圆锥的侧面展开图是半径为8 cm，圆心角120°的扇形，则此圆锥底面半径是( )。

相关内容：圆锥,半径,圆心角,扇形,底面

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