用一个圆心角为120°，半径为18cm 的扇形作一个圆锥的侧面，则这个圆锥的底面半径应等于_1．_刷题宝

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用一个圆心角为120°，半径为18cm 的扇形作一个圆锥的侧面，则这个圆锥的底面半径应等于____．

上一题下一题 0.0难度选择题更新时间:2015-10-11 07:59:42

答案(点此获取答案解析）

6cm

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