1 . 如图,在直角梯形
中,
,D为
边中点,将
沿
边折到
.连接
得到四棱锥
,记二面角
的平面角为
,下列说法中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/ed78f911-cb80-4467-bd91-6010f89b329a.png?resizew=350)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bf5dc946c282a561feb306ebf96755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43726b50a294057f87e0574e86f4e3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a921f7e5ddbb67adc1cd2658bb9a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c6caa0455442437177ab9b995df37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd92ae4f5a12404ca5bcc4428bc8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/ed78f911-cb80-4467-bd91-6010f89b329a.png?resizew=350)
A.若![]() ![]() ![]() |
B.无论![]() ![]() ![]() |
C.无论![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2023-03-16更新
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2卷引用:四川省凉山州2023届高三下学期二诊理科数学试题
名校
解题方法
2 . 《几何原本》是古希腊数学家欧几里得的一部不朽之作,其第十一卷中称轴截面为等腰直角三角形的圆锥为直角圆锥,如图所示,在直角圆锥
中,AB为底面圆的直径,C在底面圆周上且为弧AB的中点,则异面直线PA与BC所成角的大小为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/2d7b0429-089d-46fd-8bd2-1c5aa25f3b2e.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/2d7b0429-089d-46fd-8bd2-1c5aa25f3b2e.png?resizew=165)
A.30° | B.45° | C.60° | D.90° |
您最近一年使用:0次
2021-10-05更新
|
975次组卷
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5卷引用:四川省广元中学2021-2022学年高二下学期入学考试理科数学试题
四川省广元中学2021-2022学年高二下学期入学考试理科数学试题陕西省咸阳市2021-2022学年高三上学期开学摸底考试文科数学试题(已下线)专题9.6—立体几何—异面直线所成的角2—2022届高三数学一轮复习精讲精练(已下线)专题25 欧几里得(已下线)第二章 立体几何中的计算 专题一 空间角 微点3 异面直线所成角综合训练【培优版】
3 . 如图,在棱长为
的正方体
中,
,
,
分别为
,
,
的中点,
,
分别在
,
上,且
,
,点
为
上的动点,则下列结论中,正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761270394183680/2791153316265984/STEM/2b07604f-9089-4af6-9f58-b8b84deeedff.png?resizew=271)
(1)
与
所成的角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.png)
(2)
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831097ce31934e2f7b21c4927b7618f2.png)
(3)
,
,
,
四点共面
(4)当
时,三棱锥
的外接球表面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d80f16c3278cd252725625dcf253cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a2e9e025bd490e5b6e8cb8424ce6cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d170ec0486d4dda52de77cc30b877e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761270394183680/2791153316265984/STEM/2b07604f-9089-4af6-9f58-b8b84deeedff.png?resizew=271)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0875cc63101ea9c8a7ad19a94bd6d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831097ce31934e2f7b21c4927b7618f2.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4eaa1549bd1e34a2c86683d7aaba0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa2dc8fc219e57e681bb63398e01325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d80f16c3278cd252725625dcf253cda.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 下列说法正确的是( )
A.不存在四个面都是直角三角形的三棱锥 | B.共点的三条直线可确定1个或3个平面 |
C.四边形确定一个平面 | D.异面直线所成角的取值范围为![]() |
您最近一年使用:0次
2021-06-22更新
|
454次组卷
|
3卷引用:四川省成都市第七中学2020-2021学年高一下学期6月阶段考试数学试题
四川省成都市第七中学2020-2021学年高一下学期6月阶段考试数学试题 沪教版(2020) 必修第三册 精准辅导 期末测试(已下线)第二章 立体几何中的计算 专题一 空间角 微点2 异面直线所成角综合训练【基础版】