名校
1 . 如图,在四棱锥
中,底面
的边长是
的正方形,
,
,
为
上的点,且
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/a2b67562-2aa7-424d-8f5d-41122fa3ed6d.png?resizew=175)
(1)求证:
;
(2)求证:平面
平面
;
(3)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0453cfd7e92bf7746a88280b9e7b580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/a2b67562-2aa7-424d-8f5d-41122fa3ed6d.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2018-04-05更新
|
774次组卷
|
5卷引用:西藏昌都市第一高级中学2023届高三高考全真仿真考试数学(理)试题
解题方法
2 . 如图,已知等腰梯形
中,
,
为
的中点,
为
与
的交点,将
沿
向上翻折成
,使平面
平面
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572702862000128/1572702868332544/STEM/b782969e144a4923a531fccc90a93a56.png?resizew=159)
(1)求证:
;
(2)若
为
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87447b0467681a7b43623f0d3ab0ab52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b886208c6c2df19b984f2631e1c996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce7f8d07d7289b79b6e4bf3545dd2b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69eab2828488f68c5992385e8d0e8717.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572702862000128/1572702868332544/STEM/b782969e144a4923a531fccc90a93a56.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f405ee31b17b3cdccee05fd06f6562.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752dc3cc77f0d0ec4a1d0981970410a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5f236e0c248607721ff77b6ea8b6ee.png)
您最近一年使用:0次
解题方法
3 . 如图所示几何体中,四边形
和四边形
是全等的等腰梯形,且平面
平面
,
,
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572701994221568/1572702000488448/STEM/829a288111b74cbaa1015ef3bf2d5158.png?resizew=178)
(1)求证:
;
(2)求二面角
(钝角)的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eebbdc18cc3cdeac3de285024ca9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb759f80b7b99dff1ff2f4472416ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d8812461889094ac0aacf6e5aad246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572701994221568/1572702000488448/STEM/829a288111b74cbaa1015ef3bf2d5158.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b87b3be10408261827291574434d8e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c42c3bc61ef799a14bdf4742a2df37.png)
您最近一年使用:0次
10-11高三·西藏拉萨·阶段练习
名校
4 . 如图,已知四棱锥
的底面为矩形,
且
平面
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2011/5/12/1570194802278400/1570194807717888/STEM/e85d106d-77ea-4771-bba7-9c11f00aa72c.png?resizew=180)
(1)求证:
;
(2)求二面角
的大小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a696665d7435296821bf075e4e4dab11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58bf40f6235d0231481c2598e2ba977b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb19cb4eb2d7f3207559eb07355ba2.png)
![](https://img.xkw.com/dksih/QBM/2011/5/12/1570194802278400/1570194807717888/STEM/e85d106d-77ea-4771-bba7-9c11f00aa72c.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7459863f058993e17b7dcf902053eccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f8759991daa986ef2e729fb6170ccf.png)
您最近一年使用:0次
2011·西藏拉萨·模拟预测
5 . 如图,在直三棱柱
中
.
![](https://img.xkw.com/dksih/QBM/2011/4/22/1570125813981184/1570125819559936/STEM/091ebdcdd45b45b98d0e1c5b877f84d8.png?resizew=120)
(1)证明:
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced9aa875af0b879f644b1b1ad35ced8.png)
![](https://img.xkw.com/dksih/QBM/2011/4/22/1570125813981184/1570125819559936/STEM/091ebdcdd45b45b98d0e1c5b877f84d8.png?resizew=120)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba985fb50a9078a839b66bf1d1eadea9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0218542daefa15910d5111b27e71f5b3.png)
您最近一年使用:0次
11-12高一上·广东揭阳·期末
名校
6 . 如图所示,在棱长为2的正方体
中,
、
分别为
、
的
中点.
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
中点.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d435974639ea2850bb5c21efe64b123b.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2b126cad704c02e62fd5a5499f8e91.png)
![](https://img.xkw.com/dksih/QBM/2011/3/21/1570050799984640/1570050805309440/STEM/e7c93eab-cfea-4bcf-84e3-458af1f25ef7.png?resizew=253)
您最近一年使用:0次