如图,已知正方体
中,
,点
分别是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/30c67f50-5d4b-4700-b78c-995aed5f1391.png?resizew=166)
(1)证明:
四点共面;
(2)证明:平面
平面
;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4457a029cd930f0052f1c80cfe06d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56ad689a4359eddc5e80864dd13f168.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/30c67f50-5d4b-4700-b78c-995aed5f1391.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4457a029cd930f0052f1c80cfe06d00.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4324579a3ad9285fb3f58b1abc971773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134c3d2c318a33a82da4134dd17fa57e.png)
20-21高二上·四川南充·阶段练习 查看更多[3]
四川省南充高级中学2020-2021学年高二上学期第二次月考数学(文)试题(已下线)2020年高考全国3数学文高考真题变式题16-20题苏教版(2019) 必修第二册 过关斩将 第13章 本章达标检测
更新时间:2021-01-13 11:37:44
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,正三棱柱
内接于圆柱,圆柱底面半径为
,圆柱高为4.若D,E分别为
,
中点.
(1)求证:D、E、B、C四点共面;
(2)若直线
与直线
交于点P,求证:点P在直线
上;
(3)若从圆柱中把该正三棱柱
挖掉,求剩余几何体的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/33de346e-3d01-4553-b490-f9e83c116a5a.png?resizew=119)
(1)求证:D、E、B、C四点共面;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(3)若从圆柱中把该正三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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【推荐2】如图,已知a⊂α,b⊂α,a∩b=A,P∈b,PQ∥a;求证:PQ⊂α.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/6c5caa04-266f-4950-8a92-5765b2256867.png?resizew=179)
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【推荐1】如图,已知以
为圆心,
为半径的圆在平面
上,若
,且
,
、
为圆
的半径,且
,
为线段
的中点.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a23cc18b-7663-465c-8a84-cdcbc9234b47.png?resizew=176)
(1)异面直线
,
所成角的大小;
(2)点
到平面
的距离;
(3)异面直线
,
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59169f91ebc758ba6e73fc99fcfaab15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0819cd060cdfb72896f379db29a4724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a23cc18b-7663-465c-8a84-cdcbc9234b47.png?resizew=176)
(1)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(3)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
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解题方法
【推荐2】如图,四棱锥
中,底面
为菱形,且
,
.
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392378597376/1572392381898752/STEM/9fbfbd59cae34e53a399d6e618093a64.png?resizew=229)
(1)求证:
;
(2)若
,求点C到平面PBD的距离.
![](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/f5448a23ab911e64fdb683091a2093ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392378597376/1572392381898752/STEM/9fbfbd59cae34e53a399d6e618093a64.png?resizew=229)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9104a1941e557a85fd1496bc2b9be297.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0a0c299356c26338d4153748e8a61d.png)
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【推荐1】如图,在四棱锥
中,
,
,
,
,
为正三角形,
是
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599997742252032/2603302291300352/STEM/2d2243fa77554be78f9963060017deac.png?resizew=203)
(1)求证:平面
平面
;
(2)求二面角
的余弦值;
(3)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c800b6aabdc453e2c7e343061e9c6a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ee682e84c4868ecc516f8b48ad6844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599997742252032/2603302291300352/STEM/2d2243fa77554be78f9963060017deac.png?resizew=203)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac48b9ac8efbf41d6ab5242d247bd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
(3)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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【推荐2】如图所示,已知多面体PABCDE的底面ABCD是边长为2的菱形,
底面ABCD,
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/9fda6e3b-2de7-422e-8501-bab5a4abc744.png?resizew=204)
(1)证明:
平面ABP;
(2)证明:平面
平面BDE;
(3)若
,求棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec7c1be3323af9abad2c5e3b1bb707b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e0f24301cd1bfb1348f4d51f5d4d4a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/9fda6e3b-2de7-422e-8501-bab5a4abc744.png?resizew=204)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a20ea69475dcf57a5ff18c13eceaaa.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d492a2248463e0c0199a25d0f76d23.png)
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