已知在三棱锥
中,平面
平面
为等腰直角三角形,且腰
,
为平面
内动点,
为
的中点,满足
平面
,下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c0227553be156388b9c591adc138e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56839f286e88ba3b89b992c504a324ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75844725734f498eb983fe76cece2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
A.PC与平面![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
21-22高一下·河北张家口·阶段练习 查看更多[2]
更新时间:2022-08-19 16:01:55
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相似题推荐
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【推荐1】如图,正方体
的棱长为
分别为
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd21f1df5df752343fd02502854eacb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473ce0e22c4edc6ef768e0c12f59e483.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/6568ad7f-8893-402c-bc06-f97082ea739d.png?resizew=151)
A.点![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.二面角![]() ![]() |
D.平面![]() ![]() |
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【推荐2】如图,P是棱长为2的正方体
的表面上一个动点,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf725e3d44c1b473c0e748ac2f45f5a.png)
A.当P在平面![]() ![]() |
B.当P在线段AC上运动时,![]() ![]() ![]() |
C.使得直线AP与平面ABCD所成的角为45°的点P的轨迹长度为π+4![]() |
D.若F是棱![]() ![]() ![]() |
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【推荐1】下列命题正确的是( )
A.函数![]() ![]() ![]() ![]() ![]() ![]() |
B.平面![]() ![]() ![]() ![]() ![]() |
C.方程![]() ![]() |
D.若![]() ![]() |
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解题方法
【推荐2】如图,在棱长为2的正方体
中,点
在线段
上运动,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/5a8e833c-bcbd-4239-9f58-9507fa4f2e23.png?resizew=146)
![](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/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/5a8e833c-bcbd-4239-9f58-9507fa4f2e23.png?resizew=146)
A.几何体![]() ![]() |
B.![]() ![]() |
C.异面直线![]() ![]() ![]() |
D.面![]() ![]() ![]() |
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【推荐1】已知在直三棱柱
中,
,O为
的中点.点P是
上的动点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/a22230d3-1592-4573-8249-2eba6612019b.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca650d801baa594d7cea6b988fac2c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/a22230d3-1592-4573-8249-2eba6612019b.png?resizew=158)
A.当点P运动到![]() ![]() ![]() ![]() |
B.无论点P在![]() ![]() |
C.当点P运动到![]() ![]() ![]() ![]() |
D.当点P在![]() ![]() ![]() |
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【推荐2】如图直角梯形
中,
,
,
,
为
中点.以
为折痕把
折起,使点
到达点
的位置,且
则
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/486d6a23-9e72-4c56-aeac-d89038c2f465.png?resizew=245)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33300b171cc4e368520f9de8537e85c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9641d01140939c44450bf39773272af6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/486d6a23-9e72-4c56-aeac-d89038c2f465.png?resizew=245)
A.平面![]() ![]() | B.![]() |
C.二面角![]() ![]() | D.![]() ![]() ![]() |
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【推荐3】已知三棱锥
中,
,
是边长为
的正三角形,
,
分别是
,
的中点,
,则以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fc65a72853bd8ac1ad0828270d3baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33f381b03270154695d6b5421b1e739.png)
A.![]() |
B.![]() ![]() ![]() |
C.此三棱锥外接球的体积是![]() |
D.此三棱锥的表面积与它的外接球的表面积的比值为![]() |
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解题方法
【推荐1】在一个圆锥中,D为圆锥的顶点,O为圆锥底面圆的圆心,P为线段DO的中点,AE为底面圆的直径,
是底面圆的内接正三角形,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ea4bd288944d3ba3d6a319de869dce.png)
A.BE∥平面PAC |
B.PA⊥平面PBC |
C.在圆锥侧面上,点A到DB中点的最短距离为![]() |
D.记直线DO与过点P的平面α所成的角为θ,当![]() |
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【推荐2】已知正方体
的棱长为2,
为
的中点,
为正方形
所在平面内一动点,则下列命题正确的有( )
![](https://img.xkw.com/dksih/QBM/2021/11/11/2849020654641152/2851113712009216/STEM/d324f64cbf0543fbbe9991e1a0dbd77d.png?resizew=182)
![](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/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/11/11/2849020654641152/2851113712009216/STEM/d324f64cbf0543fbbe9991e1a0dbd77d.png?resizew=182)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次