名校
1 . (本题满分14分)
已知点
是正方形ABCD两对角线的交点,DE⊥平面ABCD,BF⊥平面ABCD,且AB=BF=2DE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/02e06293-dc24-47c7-84a0-e8d8df774450.png?resizew=171)
(Ⅰ)求证:EO⊥平面AFC;
(Ⅱ)试问在线段DF(不含端点)上是否存在一点R,使得CR∥平面ABF,若存在,请指出点R的位置;若不存在,请说明理由.
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/02e06293-dc24-47c7-84a0-e8d8df774450.png?resizew=171)
(Ⅰ)求证:EO⊥平面AFC;
(Ⅱ)试问在线段DF(不含端点)上是否存在一点R,使得CR∥平面ABF,若存在,请指出点R的位置;若不存在,请说明理由.
您最近一年使用:0次
2020-08-05更新
|
1225次组卷
|
4卷引用:江苏省吴江区吴江中学2020年高考数学模拟试卷-徐敏【2020原创资源大赛】
江苏省吴江区吴江中学2020年高考数学模拟试卷-徐敏【2020原创资源大赛】(已下线)专题8.6 第八章《立体几何初步》单元测试(B卷提升篇)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材人教A版,浙江专用)(已下线)第八章 立体几何初步单元自测卷(二)山东省济南市天桥区天桥区黄河双语实验学校2022-2023学年高一下学期5月月考数学试题
名校
解题方法
2 . (本小题满分14分)
如图,在三棱锥
中,
,
分别为棱
,
上的三等份点,
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/5/2521344947749888/2521405014384640/STEM/9da6772742324bd0b283f577640a69a4.png?resizew=158)
(1)求证:
平面
;
(2)若
,
平面
,求证:平面
平面
.
如图,在三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4381f2b66d0bb7bc081c1ccf59149120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73c8c1d2ba6b29b301380a45dfbcdd8.png)
![](https://img.xkw.com/dksih/QBM/2020/8/5/2521344947749888/2521405014384640/STEM/9da6772742324bd0b283f577640a69a4.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debdc6632a4877e5131d3da25cda8b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9c7cbcc38b28d45c8539710e5b260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
解题方法
3 . 在如图所示的空间几何体中,
是以BC为底边的等腰三角形,M是BC的中点,DA、EB都垂直于平面ABC.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/37ae710e-da8f-4bbb-8842-e7e419fa5e6d.png?resizew=151)
(1)
平面EBC;
(2)
平面EBC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/37ae710e-da8f-4bbb-8842-e7e419fa5e6d.png?resizew=151)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b207a4ead059dbc203b35baffe61a5b.png)
您最近一年使用:0次
解题方法
4 . 如图,在四边形ABCD中,
,
,
,
平面ABCD,
,且
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a7d77479-7858-489b-a76f-44719d409869.png?resizew=200)
(1)
平面ACF;
(2)平面
平面BDEF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2aabb3232e9ffabad9def25515cbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef7ba7bd94c55dc1a5c056fea0368a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22f3143a34f1f78bc5ef35c24d4beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f72423bf19b975448fd2a0eb4b4cbd3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a7d77479-7858-489b-a76f-44719d409869.png?resizew=200)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在斜三棱柱
中,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516897096720384/2517780625432576/STEM/e3be53d752724a169921c6f932974126.png?resizew=208)
求证:(1)
是
的中点;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252143a7b900d33862f60b2536f6a8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554923047631d16320c2ba39abeee99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516897096720384/2517780625432576/STEM/e3be53d752724a169921c6f932974126.png?resizew=208)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2340abb56da9c571b7f17bb21cabe010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2020-07-31更新
|
369次组卷
|
3卷引用:江苏省南通市2020届高三下学期高考考前模拟卷(一)数学试题
江苏省南通市2020届高三下学期高考考前模拟卷(一)数学试题(已下线)专题15 空间线面位置关系的证明-2020年高考数学母题题源解密(江苏专版)黑龙江省大庆市第四中学2019-2020学年高一下学期第三次检测数学(理)试题
解题方法
6 . 在三棱锥
中,
,
,
为直角,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/8246bfc0-748c-4aaf-a67a-9c47642558d8.png?resizew=177)
(1)求证:
平面
;
(2)若
在线段
上,且
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60964e720188e325eb18c9528b1fa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/8246bfc0-748c-4aaf-a67a-9c47642558d8.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa674a0108d37a8fb29abbd3d95123f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
您最近一年使用:0次
7 . 如图,三棱柱ABC﹣A1B1C1中,BC=B1C,O为四边形ACC1A1对角线交点,F为棱BB1的中点,且AF⊥平面BCC1B1.
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512863004360704/2513463027539969/STEM/97b46913-394a-4d31-825d-79c42558c119.png)
(1)证明:OF∥平面ABC;
(2)证明:四边形
为矩形.
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512863004360704/2513463027539969/STEM/97b46913-394a-4d31-825d-79c42558c119.png)
(1)证明:OF∥平面ABC;
(2)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在斜三棱柱
中,侧面
是菱形,
,
,
为
的中点,过
、
、
三点的平面交
于点
.求证:
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512926735720448/2513375020253184/STEM/cb5e17f41ede49fb9676d2e67a2bfdad.png?resizew=235)
(1)
;
(2)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70d708336d4f15e7fca0b26acb353b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512926735720448/2513375020253184/STEM/cb5e17f41ede49fb9676d2e67a2bfdad.png?resizew=235)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605ce6f221ce8cad191da0f84a216d0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfc67f86e81cdd466230531ac658016.png)
您最近一年使用:0次
名校
解题方法
9 . 如图在四棱锥
中,
面ABCD,底面ABCD为菱形,且∠ABC=60°,E为CD的中点,F为PD上一点.
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510816558587904/2511607229235200/STEM/0b3b0b1bb62a4683a77c0a57f3dc2960.png?resizew=290)
(1)求证:BD⊥平面PAC;
(2)求证:平面PAB⊥平面FAE;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510816558587904/2511607229235200/STEM/0b3b0b1bb62a4683a77c0a57f3dc2960.png?resizew=290)
(1)求证:BD⊥平面PAC;
(2)求证:平面PAB⊥平面FAE;
您最近一年使用:0次
2020-07-22更新
|
845次组卷
|
3卷引用:江苏省2024年普通高中学业水平合格性考试数学全真模拟数学试题03
名校
解题方法
10 . 如图,在平面直角坐标系
中,已知圆
,圆
,A是第一象限内的一点,其坐标为
.
(1)若
,求t的值;
(2)过A点作斜率为k的直线l,
①若直线l和圆
,圆
均相切,求k的值;
②若直线l和圆
,圆
分别相交于
和
,且
,求t的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8467abcd508917e743ffbc017051685e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf18c06ad70688af34ee6cb5b49555d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fbfb3f3f4aef5524c50e58af0378b59.png)
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505227934752768/2506703267495936/STEM/2c4077d562454a568b6f872ab03fbb88.png?resizew=347)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed463ef4877aceee58c6716ae832cfe.png)
(2)过A点作斜率为k的直线l,
①若直线l和圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
②若直线l和圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
您最近一年使用:0次