名校
解题方法
1 . 如图,三棱锥
中,平面
平面
,
,
,
,
为线段
中点,点
线段
上,点
,
分别在线段
,
上.
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720957629218816/2725681220272128/STEM/38e5a0cd8ea64040b2d2e11a655e5370.png?resizew=231)
(1)若平面
平面
,求线段
的长;
(2)在(1)的条件下,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1334a80265b1fccb36603e620b1f93b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9ee83e4cba2d1da675814c0bbbf822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eede8a5355b8a8d9a9f904fdc1c29253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720957629218816/2725681220272128/STEM/38e5a0cd8ea64040b2d2e11a655e5370.png?resizew=231)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78eb0e7bd1ab94d6b3a03756bcbb0e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f457418e6a7e21f0ed0bf490a3709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
(2)在(1)的条件下,求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542fce85d46dbdd033ff723a4181b4a7.png)
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2021-05-21更新
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2卷引用:四川省绵阳市南山中学双语学校2020-2021学年高二下学期6月月考数学(文)试题