如图,四棱锥
的底面是正方形,PA⊥平面ABCD,E,F分别为AB,PD的中点,且PA=AD=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/bcedff8f-a1f1-4902-af77-49b7a141c11d.png?resizew=187)
(1)求证:
平面PEC;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/bcedff8f-a1f1-4902-af77-49b7a141c11d.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c548a33e9888a9bf2d455a5c59dd62.png)
21-22高二下·四川南充·期末 查看更多[9]
四川省南充市2021-2022学年高二下学期期末数学(文)试题(已下线)第03讲 空间直线、平面的平行 (精讲)-1(已下线)专题5 综合闯关(基础版)陕西省汉中市2020-2021学年高一上学期期末数学试题(已下线)空间直线、平面的平行(已下线)8.5 空间直线、平面的平行(精练)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)8.5.1-8.5.2 直线与直线、直线与平面平行(1)-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)(已下线)核心考点07空间直线、平面的平行-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)四川省南充市阆中市川绵外国语学校2023-2024学年高二上学期期末复习数学试题(一)
更新时间:2023-01-28 20:26:46
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相似题推荐
解答题-证明题
|
较易
(0.85)
解题方法
【推荐1】如图,在四棱锥
的底面是边长为
的正方形,
平面
,
分别是
的中点,
.
(1)求证:
;
(2)求证:
∥平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16adafbfd5040ddbecd4646ef54a924c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90da62f1614568a0b1e5e47ea85e7e3c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e79bbbd8aaa1c1ccbe81d7ef60c305.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/52935cde-537f-4c19-880c-01b62e85f3ff.png?resizew=171)
您最近一年使用:0次
解答题-问答题
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(0.85)
解题方法
【推荐2】如图,长方体
的底面
是正方形,点
在棱
上,
.
(1)证明:
平面
;
(2)若
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c810d9d154dbbc0cef6ab8ffcd488045.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/e5747308-c615-4cff-8f60-47b2ce08bbf9.png?resizew=122)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c4f474f2c144be8703517ef72b98a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d0fdc5a00ca0e857b89a7e1420df29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e238bddad2ce99ad06214bf9d4eecc30.png)
您最近一年使用:0次
解答题-证明题
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【推荐1】如图,四棱锥P-ABCD中,底面ABCD为矩形,PA⊥平面ABCD,
,
,
,
,设平面DAE与平面AEC的夹角为θ.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/ac2c1be7-d890-46ce-936a-ec503db07adb.png?resizew=194)
(1)当
时.求证:
平面ACE;
(2)若
时,求PC与平面ACE所成角的正弦值;
(3)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7d21e3f1f0ce82530c861b28f55faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067567dc88fbb63cacabaaf2526c3f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35f854252711eda0da03aa03d167403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96c79c9cd9151d417db36697f538713.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/ac2c1be7-d890-46ce-936a-ec503db07adb.png?resizew=194)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253c1036cfa4a9f4058906069e03faee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253c1036cfa4a9f4058906069e03faee.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41bb1e36a0f38440d3cf95158a5bef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c62e7c58606b2250c6d189d85a6ea8.png)
您最近一年使用:0次
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(0.85)
名校
解题方法
【推荐2】如图(1)示,在梯形
中,
,
,且
,如图(2)沿
将四边形
折起,使得平面
与平面
垂直,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/d8900cc4-01f2-468a-b337-f1917f08da38.png?resizew=252)
(1)求证:
面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc58a5339fe17858661b69883567636.png)
(2)求证:
;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f90126f831d6600522ecaa66c2a8b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcc0752fae478b2a8ea6f37acbef5c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca62001f03424f892c0827ba05faec47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/d8900cc4-01f2-468a-b337-f1917f08da38.png?resizew=252)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963a91995abd4927d75406d16e10a81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc58a5339fe17858661b69883567636.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7e284eac4b90bfb327de768a7beef6.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
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解答题-证明题
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(0.85)
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【推荐3】如图,底面是正三角形的直棱柱
中,点D是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/0b727a5c-1618-423a-aa5d-63d0a873a587.png?resizew=215)
(1)求证:
平面
;
(2)当M是棱
上中点时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad91719bd5fdc1b2d3d5298f2f44cc2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/0b727a5c-1618-423a-aa5d-63d0a873a587.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554923047631d16320c2ba39abeee99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5888bec948373f3854258ad80171073d.png)
(2)当M是棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100acb9a8ee12a2057754831c2f95cc1.png)
您最近一年使用:0次