解题方法
1 . 夹在两个平行平面间的两线段AB,CD或它们的延长线相交于点S,已知
,
,
,求线段CS的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b96b6aa11c60dc9d174b9afdbb0392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2c28bf73bcef2b9bbc0de14c7fcfd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552b53b1bc1443be9198552724d9215b.png)
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解题方法
2 . 已知直线a,b是异面直线.求证:存在两个平行平面
,
,使得
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d2a947e3fdc214d40a7d3f54679a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
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