解题方法
1 . 如图,在多面体
中,
是四边形
的外接圆的直径,
是
与
的交点,
,
.四边形
是直角梯形,
,
平面
,
.
(1)求证:
平面
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5640c531110986a503de677715770e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8139d9fd5c670c91aa7dc485366dd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4592d3d223b4f8c93c9308afadfa79b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/ba2c66a8-559a-42e7-950a-89bb8b177514.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
您最近一年使用:0次
解题方法
2 . 如图,在直四棱柱
中,底面
是菱形,
,点
为
的中点,点
为
的中点.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
平面
;
(2)证明:平面
平面
.
![](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/1bec4c6c1db8019ea5daa5d7ccb2641f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/fc9066c0-d97a-4e2f-b9df-cc9faf647118.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f4920aa344a6a1bf5ac5c6724f57d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
您最近一年使用:0次
名校
3 . 如图,四棱锥
的侧面
是边长为2的正三角形,底面
为正方形,且平面
平面
,
,
分别为
,
的中点.
;
(2)在线段
上是否存在一点
使得
平面
,存在指出位置,不存在请说明理由.
(3)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014c4c0d6c8e50e5c6c83e857f9ecac7.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8014e499e7852b587b3b36af14b7816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d62de810f5160223afa54fd882acb9b.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80c2240af31b07857eaac003b3d8132.png)
您最近一年使用:0次
2023-07-27更新
|
1991次组卷
|
8卷引用:江西省吉安市第三中学2023-2024学年高二上学期开学考试(艺术类)数学试题
江西省吉安市第三中学2023-2024学年高二上学期开学考试(艺术类)数学试题福建省福州高级中学2022-2023学年高一下学期第四学段(期末)考试数学试题(已下线)【一题多解】立体几何 新旧呼应(已下线)第二章 立体几何中的计算 专题一 空间角 微点8 二面角大小的计算(三)【培优版】(已下线)高一下学期期中复习解答题压轴题十八大题型专练(2)-举一反三系列(人教A版2019必修第二册)云南省大理白族自治州祥云县祥云祥华中学2023-2024学年高一下学期4月二调数学试题福建省宁德市博雅培文学校2023-2024学年高一下学期5月月考数学试题(已下线)专题02 高一下期末真题精选(2)-期末考点大串讲(人教A版2019必修第二册)
名校
解题方法
4 . 如图,在四棱锥
中,底面
是菱形.
是
的中点,证明:
平面
;
(2)若
,
,且平面
平面
,求二面角
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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf2bc3dd1f1ae5d5e28b0366f454ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5363352988977cd5c38286b17a1097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5bb46c1fc4e45ff911ef19e3c1f27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9f1e2b86f4eca37c72011d3dffb0c9.png)
您最近一年使用:0次
2023-07-26更新
|
1163次组卷
|
6卷引用:江西省萍乡市安源中学2022-2023学年高一下学期期末质量检测数学试题
江西省萍乡市安源中学2022-2023学年高一下学期期末质量检测数学试题河南省商丘市第一中学2022-2023学年高一下学期期末数学试题贵州省铜仁第一中学2023-2024学年高二上学期8月摸底衔接质量检测(二)数学试题广西南宁市邕宁高级中学2023-2024学年高二上学期数学测试试题(一)广东省深圳外国语学校(集团)龙华高中部2023-2024学年高二上学期开学考试数学试题(已下线)第六章立体几何初步章末二十种常考题型归类(2)-【帮课堂】(北师大版2019必修第二册)
解题方法
5 . 如图,四棱锥
的侧面PAD是边长为2的正三角形,底面ABCD为正方形,且平面
平面ABCD,Q,M,N分别为PB,AB,AD的中点.
(1)证明:
平面PDC;
(2)证明:
;
(3)求直线PM与平面PNC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/d0be1b51-05dd-421a-99ed-23d077eb60f2.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195dab39a4be8d9c1255dfad3cbb7b07.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014c4c0d6c8e50e5c6c83e857f9ecac7.png)
(3)求直线PM与平面PNC所成角的正弦值.
您最近一年使用:0次
名校
解题方法
6 . 如图,在正方体
中,点E,F分别是棱
,
的中点.
(1)求证:
平面
;
(2)求异面直线
与AF所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/48ce9f4e-f66e-4c29-a6ed-c42e509f560e.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4a94e889d2869ea84082575fae52ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d365ce9f4bacc4d4bb15dbdb5306a5.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
您最近一年使用:0次
2023-07-25更新
|
312次组卷
|
2卷引用:江西省萍乡市2022-2023学年高一下学期期末考试数学试题
解题方法
7 . 如图,
为圆锥的顶点,
是圆锥底面的圆心,
是底面的内接正三角形,
是
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/bd9a1f8b-1cf5-4129-afe5-f46de2ee6401.png?resizew=204)
(1)求证:
∥平面
;
(2)若
,
,求圆锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c39e44b50d0cac4a10106f8d09339.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/bd9a1f8b-1cf5-4129-afe5-f46de2ee6401.png?resizew=204)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93767331e9bac06a564973a9f4fc663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9344303efb0541eb449d782ad2b488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
您最近一年使用:0次
解题方法
8 . 如图,在三棱锥
中,
,点D,M分别为AC,PB的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/41844a0a-3d7d-4ab6-b0cf-7826649f5e4b.png?resizew=149)
(1)证明:
//平面BDF;
(2)若平面
//平面BDF,其中
平面
,
,证明:AN是AM在平面PAC上的投影.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8459bfe1dd87957f217ffcd0d10f6f92.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/41844a0a-3d7d-4ab6-b0cf-7826649f5e4b.png?resizew=149)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc986df251862fc30dbc7717d644ebde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f69c81371d95d5651999011237b8251b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828247a3338571cb0d4ba2a5bf88929c.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,
中,
,
是正方形,平面
平面
,若
、
分别是
、
的中点.
(1)求证:
∥平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6321a96e7f0768394f6932a121adc84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5352d28609d1b3d09a0a29d023d1bb72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/30978d16-29fa-47c0-9501-0b4b46c22b8a.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
2023-07-18更新
|
1433次组卷
|
5卷引用:江西省宜春市宜丰县宜丰中学2023-2024学年高二上学期开学考试数学试题
名校
10 . 如图,正四棱台
中,
,
,
.
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
平面
;
(2)若
,求异面直线
与
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55731dcaa0628ad98b3a6bd76e094da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adaf232f9825e5b1cb1ce6df59ed9053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad7cddb5318cd0016809eb6cf5b5422.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/c50e01a7-a4b3-4713-bc65-3b830d5f8fbe.png?resizew=161)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae20f596174c7b5c8684ef09c5381bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
您最近一年使用:0次
2023-07-16更新
|
266次组卷
|
2卷引用:江西省上饶市2022-2023学年高一下学期期末教学质量测试数学试题