如图,直四棱柱
的底面
为直角梯形,
,
,
,
,
、
分别为棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e41ff8de-2807-44bc-a978-37a601f7a5b6.png?resizew=183)
(1)在图中作出平面
与该棱柱的截面图形,并用阴影部分表示(不必写出作图过程);
(2)
为棱
的中点,求异面直线
与
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](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/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9db73dad37a8a07a7ccc49101db545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e41ff8de-2807-44bc-a978-37a601f7a5b6.png?resizew=183)
(1)在图中作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd5b5d9bed01632b26ab881deab2afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
更新时间:2022-01-02 10:09:23
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】正六棱柱
,两条相对侧棱所在的轴截面为正方形,高为4,记
的中点分别为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/29/a48d9fcc-7fcb-4f93-b110-c37c0165822f.png?resizew=159)
(1)要经过点
和对角线
将六棱柱锯开,请说明在六棱柱表面该怎样划线,并求截面面积;
(2)证明:
平面
;
(3)直线
上是否存在一个点
,使得平面
平面
?若存在,求出
的长度;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0395bb06ff1e38eaf3e5f7a5a790b269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727e9fd6b8922131eda8a85b32fdafab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f195bfd860a3f0a4d3d3ceed03f3580.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/29/a48d9fcc-7fcb-4f93-b110-c37c0165822f.png?resizew=159)
(1)要经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53b44617f5b4845321620a65260dc32.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72221ee5b504d596ff799c0b356aa0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b0e2102f5feb910463ae532ea3ca06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5395f1811518a917a30e5949c4c8fc57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
解题方法
【推荐2】如图正方体
的棱长为2,
是线段
的中点,平面
过点
.
截正方体所得的截面,并简要叙述理由或作图步骤;
(2)求(1)中截面多边形的面积;
(3)平面
截正方体,把正方体分为两部分,求较小的部分与较大的部分的体积的比值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e5eadee90c7863040cd6889ad8b4b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)求(1)中截面多边形的面积;
(3)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知平行六面体
中,各条棱长均为
,底面是正方形,且
,设
,
,
.
(1)用
,
,
表示
及求
;
(2)求异面直线
与
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b75db2f07d10b338ba48863b03c5b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87ee4aeefe466d8c0f860f10c21e162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f6d9983221f519dd94ecf8fafa9cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8666756c66fe78398b5109b5fab17d78.png)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6361249877a88f60d4b3bb71ef7b5517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71423ae367bc116c93dc3cf87777b9e.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】在正四棱柱ABCD—
中,
P为B1C1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/6288a26e-a8c6-43a4-901f-c58adebb923b.png?resizew=187)
(1)求异面直线AC与BP所成的角
(2)求直线AC与平面ABP所成的角
(3)求二面角
的余弦值
(4)求点B到平面APC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e18d304c8b07cd4d7e8070ae6f39401.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/6288a26e-a8c6-43a4-901f-c58adebb923b.png?resizew=187)
(1)求异面直线AC与BP所成的角
(2)求直线AC与平面ABP所成的角
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f7a0ab16cbb95691b3d80334a91401.png)
(4)求点B到平面APC的距离.
您最近一年使用:0次