解题方法
1 . 如图,在四棱锥
中,侧面
是正三角形,且与底面
垂直,已知底面
是菱形,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/77e2ca8e-b809-4782-966c-ef5b7ee70557.png?resizew=178)
(1)求证:
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.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/03977f376d19e1ba2e50881e511e3e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/77e2ca8e-b809-4782-966c-ef5b7ee70557.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe67036b4671b5d2a5c55b48c4d3bb9.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,在四棱锥
中,底面ABCD是矩形,
,
,
底面ABCD,
,E为PB中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/2e29a3f7-484e-45e2-9478-10d9703fdd6b.png?resizew=162)
(1)求证:
;
(2)求平面EAD与平面PCD所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/2e29a3f7-484e-45e2-9478-10d9703fdd6b.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
(2)求平面EAD与平面PCD所成锐二面角的余弦值.
您最近一年使用:0次
2023-12-11更新
|
1043次组卷
|
3卷引用:贵州省黔东南自治州镇远县文德民族中学校2022届高三上学期期末数学(理)试题
解题方法
3 . 如图,在三棱柱
中,
平面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f0f57503-638c-456c-9b58-2154cb2356c8.png?resizew=143)
(1)求异面直线
与
所成角的大小;
(2)在线段
上是否存在点
,使得
平面
?如果存在,请在图中作出点
,(不写做法,但保留作图痕迹)并加以证明;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8cdac774862a0b18d46f790ac39f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f0f57503-638c-456c-9b58-2154cb2356c8.png?resizew=143)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
4 . 如图,在空间直角坐标系
中,A,D,B分别在x,y,z轴的正半轴上,C在平面BOD内.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759692660793344/2760746237149184/STEM/a4b5452d-5319-49e5-8058-8f6cd2585d4d.png?resizew=246)
(1)若
,证明:
.
(2)已知
,
,C的坐标为
,求BC与平面ACD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759692660793344/2760746237149184/STEM/a4b5452d-5319-49e5-8058-8f6cd2585d4d.png?resizew=246)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a26b9ab8f36629aee288b6a0fc77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53b6f482db15b1b81842983b7b53218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738b18d41a5283e5cea450511786a1e8.png)
您最近一年使用:0次
2021-07-09更新
|
167次组卷
|
4卷引用:贵州省黔西南州2020-2021学年高二下学期期末数学(理)试题
名校
解题方法
5 . 如图,在三棱锥
中,点
,
分别是棱
,
的中点,且
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/7/2500832771293184/2501464597512192/EXPLANATION/37f9c75a0b9d40b59f2cb8e4ba3015a8.png?resizew=208)
(Ⅰ)求证:
平面
;
(Ⅱ)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499f22283744d2e7cc62bc6461ac92fc.png)
![](https://img.xkw.com/dksih/QBM/2020/7/7/2500832771293184/2501464597512192/EXPLANATION/37f9c75a0b9d40b59f2cb8e4ba3015a8.png?resizew=208)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a6922808e9b59352c25c341cf23851.png)
您最近一年使用:0次
2020-07-08更新
|
750次组卷
|
3卷引用:贵州省铜仁市伟才学校2019-2020学年高一下学期期末考试数学试题
6 . 如图,直三棱柱
中,
,
,
,
,
为垂足.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/02ef9e36-5c2e-4c40-9c56-d8ec2f4865c0.png?resizew=120)
(1)求证:
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4639a9dc0bc99101cbde59fef04b4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c7a4c977e5395cd7d913b7842154eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/02ef9e36-5c2e-4c40-9c56-d8ec2f4865c0.png?resizew=120)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d9e8a7b520e7c89621182de4d35ce5.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf0f4a237fea9b94a7acd18b196ad81.png)
您最近一年使用:0次
7 . 如图所示,在正方体
中,
,
,
分别是
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110826368925696/2111489661345792/STEM/3b7077e9a0cb47d8bb1df0af506240e2.png?resizew=160)
(1)求证:直线
平面
.
(2)求直线
与
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110826368925696/2111489661345792/STEM/3b7077e9a0cb47d8bb1df0af506240e2.png?resizew=160)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1399e7ae0b2decaafc62a5cdffb15522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
您最近一年使用:0次
2018-12-13更新
|
503次组卷
|
2卷引用:【市级联考】贵州省贵阳市2017-2018学年高一(下)期末模拟数学试题
名校
8 . 如图1,正方形
的边长为
,
、
分别是
和
的中点,
是正方形的对角线
与
的交点,
是正方形两对角线的交点,现沿
将
折起到
的位置,使得
,连结
,
,
(如图2).
![](https://img.xkw.com/dksih/QBM/2019/4/1/2173156306640896/2174353253687296/STEM/010d5d46351a40c58a99040a4340f468.png?resizew=279)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7807f6a0d316671ed34c23e32fc7408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1c4ed7451103f0cbf14bb9ae219b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9b82c7e322fecb93d2138392a540e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2019/4/1/2173156306640896/2174353253687296/STEM/010d5d46351a40c58a99040a4340f468.png?resizew=279)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
您最近一年使用:0次
2017-02-08更新
|
961次组卷
|
4卷引用:贵州省安顺市平坝第一高级中学2018-2019学年高二下学期期末考试数学(文)试题
贵州省安顺市平坝第一高级中学2018-2019学年高二下学期期末考试数学(文)试题【全国百强校】江西师范大学附属中学2019高三上学期期末测试数学(文)试题2017届重庆市巴蜀中学高三文上学期期中数学卷(已下线)2018年10月21日 《每日一题》一轮复习(理数)-每周一测
9 . 如图,已知斜三棱柱ABC-A1B1C1中,AB=AC,D为线段BC的中点
![](https://img.xkw.com/dksih/QBM/2016/10/17/1573072334340096/1573072340107264/STEM/93278a12c5c040f08e73f99130ba4dcc.png)
(I)求证院A1B∥平面ADC1
(II)若平面ABC⊥平面BCC1B1,求证:AD⊥DC1
![](https://img.xkw.com/dksih/QBM/2016/10/17/1573072334340096/1573072340107264/STEM/93278a12c5c040f08e73f99130ba4dcc.png)
(I)求证院A1B∥平面ADC1
(II)若平面ABC⊥平面BCC1B1,求证:AD⊥DC1
您最近一年使用:0次
10 . 在直三棱柱ABC﹣A1B1C1中,∠BAC=90°,D,E分别为CC1和A1B1的中点,且A1A=AC=2AB=2.
![](https://img.xkw.com/dksih/QBM/2016/3/15/1572540523315200/1572540529385472/STEM/79ec55fe77d64eb6b059e4cc7d66b70c.png)
(1)求证:C1E∥面A1BD;
(2)求点C1到平面A1BD的距离.
![](https://img.xkw.com/dksih/QBM/2016/3/15/1572540523315200/1572540529385472/STEM/79ec55fe77d64eb6b059e4cc7d66b70c.png)
(1)求证:C1E∥面A1BD;
(2)求点C1到平面A1BD的距离.
您最近一年使用:0次