1 . 在三棱锥P-ABCD中,PA
平面ABC,若该三棱锥四个面均为直角三角形,则可以补充的条件为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
A.AB![]() | B.AC![]() | C.BC![]() | D.AB=AC |
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解题方法
2 . 如图,在棱长为2的正方体ABCD-A1B1C1D1中,E,F分别是DD1,DB的中点,则下列选项中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/d9e16491-ed25-41cd-a65a-e152aeeb66f7.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/d9e16491-ed25-41cd-a65a-e152aeeb66f7.png?resizew=156)
A.EF![]() |
B.EF⊥B1C |
C.EF与AD1所成角为60° |
D.EF与平面BB1C1C所成角的正弦值为![]() |
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2022-03-30更新
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1297次组卷
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6卷引用:湖北省黄石市阳新高中2021-2022学年高二上学期9月月考数学试题
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解题方法
3 . 如图,已知四棱锥
中
为矩形,
平面ABCD,
于点
,
于点
.
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878631573471232/2893836312150016/STEM/ed2eb80b-f725-4fc1-898a-a69334efad37.png?resizew=171)
(1)求证:
;
(2)若平面
交
于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c152ac8535e5e141342fc11529599841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b73523ef27a2e5f805ae49bd304ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878631573471232/2893836312150016/STEM/ed2eb80b-f725-4fc1-898a-a69334efad37.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046ced38ceae712960aca9cbf395017a.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de9f23262d5da8444b03010aa8ce4c1.png)
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解题方法
4 . 如图,在三棱锥
中,
为
的中点,点
满足
,其中
,则( )
![](https://img.xkw.com/dksih/QBM/2022/1/5/2869532678864896/2893705661513728/STEM/fbaa88fc22154d2383c8407ca4213bf6.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d116d4606349db14abe17f9bcd6ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a8b3451e0b83ee86617009e83074ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1751e5590f3b14c8fe452587809f7d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/5/2869532678864896/2893705661513728/STEM/fbaa88fc22154d2383c8407ca4213bf6.png?resizew=180)
A.![]() |
B.三棱锥![]() ![]() |
C.当二面角![]() ![]() ![]() ![]() |
D.若三棱锥形状不变,当![]() ![]() ![]() ![]() |
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2022-01-13更新
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301次组卷
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2卷引用:湖北省公安县等六县2021-2022学年高三上学期质检考试数学试题
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5 . 如图,四棱锥
的底面是正方形,平面
平面
,E为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/f3e168d3-78ea-409b-babc-5f30d4aee57f.png?resizew=218)
(1)若
,证明:
;
(2)求直线
与平面
所成角的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6136ae10717a7dcb8002ada43a025a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/f3e168d3-78ea-409b-babc-5f30d4aee57f.png?resizew=218)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c63b233cb3fe1c34755fc940468a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304e9d63e7fdc531f4f7b805b765a1b1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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2021-12-28更新
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1773次组卷
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6卷引用:华师一附中等T8联考2021-2022学年高三上学期第一次联考数学试题
名校
6 . 如图, 已知矩形
平面
, 且
, 点
为线段
(除端点外) 上的一点. 沿直线
将
向上翻折成
,
为
的中点, 则下列说法正确的有 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/f19ab5a0-39e9-46dc-9ddd-76f6bfc4dbb6.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc07ffa235cb0aab110dfeaf4e25f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae341f580ff8fbf21f616fe900b0e4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f9c64303370347131dd9d8c5c70c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/f19ab5a0-39e9-46dc-9ddd-76f6bfc4dbb6.png?resizew=179)
A.三棱锥![]() ![]() |
B.当点![]() ![]() ![]() |
C.当点![]() ![]() ![]() |
D.当点![]() ![]() ![]() ![]() |
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7 . 如图,边长为2的正方形
中,E,F分别是
的中点,将
分别沿
折起,使A,B,C重合于点P,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/12/4/2865449620832256/2865481331597312/STEM/bccfe598d06e4f38a0fea6cce0c89b4e.png?resizew=326)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0a181fb3a5a51245c82f94eebadcab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e1b35ce4e9edff774c986d78e4b39f.png)
![](https://img.xkw.com/dksih/QBM/2021/12/4/2865449620832256/2865481331597312/STEM/bccfe598d06e4f38a0fea6cce0c89b4e.png?resizew=326)
A.![]() |
B.点P到平面![]() ![]() |
C.三棱锥![]() ![]() |
D.二面角![]() ![]() |
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2021-12-06更新
|
593次组卷
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3卷引用:九师联盟2022届高三上学期11月质量检测数学试题
九师联盟2022届高三上学期11月质量检测数学试题湖北省部分学校九校联盟2021-2022学年高三上学期11月质量检测数学试题(已下线)专题2.2 模拟卷(2)-2022年高考数学大数据精选模拟卷(新高考地区专用)
名校
解题方法
8 . 已知正方体ABCD﹣A1B1C1D1内切球的表面积为π,P是空间中任意一点:
①若点P在线段AD1上运动,则始终有C1P⊥CB1;
②若M是棱C1D1中点,则直线AM与CC1是相交直线;
③若点P在线段AD1上运动,三棱锥D﹣BPC1体积为定值;
④E为AD中点,过点B1,且与平面A1BE平行的正方体的截面面积为
.
以上命题为真命题的个数为( )
①若点P在线段AD1上运动,则始终有C1P⊥CB1;
②若M是棱C1D1中点,则直线AM与CC1是相交直线;
③若点P在线段AD1上运动,三棱锥D﹣BPC1体积为定值;
④E为AD中点,过点B1,且与平面A1BE平行的正方体的截面面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
以上命题为真命题的个数为( )
A.2 | B.3 | C.4 | D.5 |
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9 . 如图,矩形
中,
,
平面
,若在线段
上至少存在一个点
满足
,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89d33248ae7cf6bb57179db6bf6a131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6bc29f18f41f6d58c5e1816d50845dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2021-11-22更新
|
575次组卷
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7卷引用:湖北省武汉市部分重点中学2022-2023学年高二上学期10月联考数学试题
湖北省武汉市部分重点中学2022-2023学年高二上学期10月联考数学试题湖北省武汉市华中科技大学附属中学2022-2023学年高二上学期期中模拟数学试题浙江省S9联盟2021-2022学年高二上学期期中联考数学试题江西省南昌大学附属中学2021-2022学年高二 4 月线上阶段检测数学(理)试题(已下线)13.2.3直线与平面位置关系(2)线面垂直的判定与性质(备作业)-【上好课】2021-2022学年高一数学同步备课系列(苏教版2019必修第二册)北京市第一六一中学2022-2023学年高二上学期期中数学试题 (已下线)专题3.6空间直线、平面的垂直-重难点突破及混淆易错规避(人教A版2019必修第二册)
名校
10 . 如图,在四棱锥S-ABCD中,已知四边形ABCD是边长为
的正方形,点S在底面ABCD上的射影为底面ABCD的中心点O,点P在棱SD上,且△SAC的面积为1.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/677aabd1-f126-4893-ad94-7ccfcc45f50d.png?resizew=183)
(1)若点P是SD的中点,求证:平面SCD⊥平面PAC;
(2)在棱SD上是否存在一点P使得平面PAC和平面ACD夹角的余弦值为
?若存在,求出点P的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/677aabd1-f126-4893-ad94-7ccfcc45f50d.png?resizew=183)
(1)若点P是SD的中点,求证:平面SCD⊥平面PAC;
(2)在棱SD上是否存在一点P使得平面PAC和平面ACD夹角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
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