如图,小正方形的边长均为1,扇形OAB是某圆锥的侧面展开图,则这个圆锥的底面周长为___ .(结果保留π)
![](https://img.xkw.com/dksih/QBM/2015/8/21/1573899551965184/1573899557879808/STEM/d59d04cb130241459dfdd76d43a2aa66.png?resizew=135)
2015·江苏扬州·一模 查看更多[4]
2015届江苏扬州宝应县九年级一模数学试卷2015届江苏省扬州市宝应县中考一模数学试卷(已下线)【万唯原创】2016年河北省中考数学-逆袭卷-逆袭特训20+21江苏省南通市崇川区启秀中学2020-2021学年九年级下学期第一次月考数学试题
更新时间:2016-12-06 02:09:45
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【推荐1】如图,正六边形
纸片中,
,分别以B、E为圆心,以6为半径画
、
.小欣把扇形
与扇形
剪下,并把它们粘贴为一个大扇形(B与E重合,F与A重合),她接着用这个大扇形作一个圆锥的侧面,则这个圆锥的高为______ .
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【推荐2】如图,已知
中,
,
,
,则经过
,
,
三点的
的长度为______ .
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