如图.在平行四边形
中,
,
,把
沿对角线
折起,使得平面
平面
后.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/8a848dca-0596-4731-9b4f-d84e24818299.png?resizew=281)
(1)求
的长;
(2)求异面直线
与
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a5c50902bea0e8e563fe156fb33d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a588bbcb6434e8e1c703219751a401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f2386a332d8fbacc59cb577c14237a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069fb06e0428a1cb2b4ce4c17eeab7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/8a848dca-0596-4731-9b4f-d84e24818299.png?resizew=281)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
22-23高二上·福建泉州·阶段练习 查看更多[2]
更新时间:2022-10-21 16:22:22
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相似题推荐
解答题-问答题
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适中
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名校
【推荐1】如图,在
中,
,斜边
,
可以通过
以直线AO为轴旋转得到,且二面角B-AO-C是直二面角,D是AB的中点,求异面直线AO与CD所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b72628ec7e43c74b639511d69803a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d815221955a96bf6f621ac979c443c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252ef711ee33db0a36aff8c24cdb7c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/a99aded7-9cfc-493b-825a-a4a0589d3b09.png?resizew=108)
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【推荐2】如图,在三棱柱
中,
是正方形
的中心,
,
平面
,且
.
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525783685234688/2528975747244032/STEM/85b373d7050949b0861a81ad704d7585.png?resizew=238)
(1)求异面直线
与
所成角的余弦值;
(2)求二面角
的正弦值;
(3)设
为棱
的中点,
在
上,并且
,点
在平面
内,且
平面
,证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf90bac174f02c4552e56df4d910bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1722a11031cf3668ac4a2abaca280cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f862a79ae6f3a1cc94884672a4d6a2.png)
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525783685234688/2528975747244032/STEM/85b373d7050949b0861a81ad704d7585.png?resizew=238)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24aee5e085257d9a3b6169ac2d65ea00.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ef07d63d8e83d1b25cb0af6b61bbb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6dfed58659a9cab4d1836c3d2effdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
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【推荐1】直三棱柱
中,
,
,
,F为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d1bb34d4-7676-4241-8d55-659892c0e7d7.png?resizew=133)
(1)求证:
;
(2)点M在线段
上运动,当三棱锥
的体积最大时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad7b03f934718b18ce34cdf0b85863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54397b1d0caa661eff63d0ae5d392b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/d1bb34d4-7676-4241-8d55-659892c0e7d7.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8350081c6259800279b6e090a2e3c5de.png)
(2)点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b875b54ca7370441a08f9e89963436b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6adefae0184f53d2916e33b15040b2.png)
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解题方法
【推荐2】如图,在四棱锥
中,
平面
,四边形
是矩形,
,点
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ddb86b6c-1bcb-44e0-ac68-aab00cd7814b.png?resizew=142)
(1)证明:平面
平面
.
(2)若
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ddb86b6c-1bcb-44e0-ac68-aab00cd7814b.png?resizew=142)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010a32eb621302fe4a397f7a667d5071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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解答题-证明题
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适中
(0.65)
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【推荐1】如图,几何体EF-ABCD中,四边形CDEF是正方形,四边形ABCD为直角梯形,AB∥CD,AD⊥DC,△ACB是腰长为2
的等腰直角三角形,平面CDEF⊥平面ABCD.
(1)求证:BC⊥AF;
(2)求几何体EF-ABCD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
(1)求证:BC⊥AF;
(2)求几何体EF-ABCD的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/011f6c09-0467-41c5-8ac5-536878a529c8.png?resizew=162)
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解题方法
【推荐2】如图,在四棱锥
中,平面
底面
,其中底面
为等腰梯形,
,
,
,
,
为
的中点.
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c63440260b680edb458756259d1920d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0453cfd7e92bf7746a88280b9e7b580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fcac3b256b269b824d8738bb081f8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d987bcf7114c002843702100444da017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8818e89658725962a7d6b0f49023e2f4.png)
![](https://img.xkw.com/dksih/QBM/2017/6/2/1700117170700288/1701852618031104/STEM/da9f6d2b3ef14a0db43852ba6293f8d7.png?resizew=197)
您最近一年使用:0次