在正六棱柱
中,若底面边长为1,高为3,则BC到平面
的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61bc06f1f5ba28c08b97bfaaae65696a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019efc97696ff32a8c1bcb82c48d2485.png)
更新时间:2023-04-14 12:30:18
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【推荐1】若圆锥底面半径为1,高为
,其中有一个内接正方体
,其中
、
、
、
四点在圆锥底面上,
、
、
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在圆锥侧面上,则这个正方体的棱长为______ .
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【推荐2】在棱长为1的正方体
中,点
为棱
的中点,点
为棱
的中点,点
为棱
的中点,点
为正方体表面及内部的点,若点
满足:
,其中
,且
,则满足条件的所有点
构成的图形的面积是___________ .
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【推荐1】如图,在正三棱柱
中,各棱长均为4,N是
的中点,则点N到直线AB的距离为___________ ;点
到平面ABN的距离为___________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
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【推荐2】平面四边形
中,
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在平面
的射影为
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的外接球球心到平面
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【推荐1】如图,若正三棱柱
的底面边长为8,对角线
的长为10,点D为
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【推荐2】在三棱锥
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的距离为________ .
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【推荐1】如图
与
所在平面垂直,且
,
,则二面角
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【推荐2】如图,在三棱锥
中,平面
平面
,
,
为
的中点.若△
是边长为1的等边三角形,点
在棱
上,
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的大小为
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