解题方法
1 . 如图,在正方体
中,
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853239418920960/2855247799205888/STEM/c3d9ea9d-6dbb-4753-a98c-b3a444f2a0ec.png?resizew=196)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853239418920960/2855247799205888/STEM/c54dc550-6be5-4b57-b67d-f0e69fefe028.png?resizew=197)
(1)画出由A,E,F确定的平面
截正方体所得的截面,(保留作图痕迹,使用铅笔作图);(2)求异面直线
和
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853239418920960/2855247799205888/STEM/c3d9ea9d-6dbb-4753-a98c-b3a444f2a0ec.png?resizew=196)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853239418920960/2855247799205888/STEM/c54dc550-6be5-4b57-b67d-f0e69fefe028.png?resizew=197)
(1)画出由A,E,F确定的平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,在四棱锥O-ABCD中,底面ABCD是边长为1的菱形,∠ABC=
,OA⊥平面ABCD,OA=2,M为OA的中点,N为BC的中点.
![](https://img.xkw.com/dksih/QBM/2021/6/17/2744962996240384/2798963204136960/STEM/29f48fd4-090c-434d-81d8-ea286bc9cd09.png?resizew=193)
(1)画出平面AMN与平面OCD的交线(保留作图痕迹,不需写出作法);
(2)证明:直线MN//平面OCD;
(3)求异面直线AB与MD所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://img.xkw.com/dksih/QBM/2021/6/17/2744962996240384/2798963204136960/STEM/29f48fd4-090c-434d-81d8-ea286bc9cd09.png?resizew=193)
(1)画出平面AMN与平面OCD的交线(保留作图痕迹,不需写出作法);
(2)证明:直线MN//平面OCD;
(3)求异面直线AB与MD所成角的大小.
您最近一年使用:0次
3 . 下图是一个几何体的三视图(单位:cm)
![](https://img.xkw.com/dksih/QBM/2018/11/8/2071234785075200/2072658477768704/STEM/6c6a0713913945bf99aba5f37e733bf2.png?resizew=328)
(Ⅰ)画出这个几何体的直观图(在空白框内作图,不要求写画法,在直观图中应标注相应的字母);
(Ⅱ)求这个几何体的表面积;
(Ⅲ)设异面直线
与
所成的角为
,求
.
![](https://img.xkw.com/dksih/QBM/2018/11/8/2071234785075200/2072658477768704/STEM/6c6a0713913945bf99aba5f37e733bf2.png?resizew=328)
(Ⅰ)画出这个几何体的直观图(在空白框内作图,不要求写画法,在直观图中应标注相应的字母);
(Ⅱ)求这个几何体的表面积;
(Ⅲ)设异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29868019d4d50665d841a4fada1fa7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8077ba36499e173a538ae8d8c5d9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e967b4f23ee2608ce1d2d4750941bdb1.png)
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解题方法
4 . 如图,在三棱柱
中,
平面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f0f57503-638c-456c-9b58-2154cb2356c8.png?resizew=143)
(1)求异面直线
与
所成角的大小;
(2)在线段
上是否存在点
,使得
平面
?如果存在,请在图中作出点
,(不写做法,但保留作图痕迹)并加以证明;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8cdac774862a0b18d46f790ac39f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/f0f57503-638c-456c-9b58-2154cb2356c8.png?resizew=143)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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5 . 已知四棱锥
的底面
是正方形,
底面
,
是
上的任意一点.过点E的平面α垂直于平面SAC.
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/adb2e9d8795a48a0a26c562e698888ab.png)
(1)请作出平面α 截四棱锥S-ABCD的截面(只需作图并写出作法);
(2)当
时,求二面角
的大小.
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/9a6d806d32c646988e39d25a035802c4.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/c76bbceb5cbe43478eddc35a6f8cc745.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/9e831b4ed6d34bd085939c11ceb29b9c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/c76bbceb5cbe43478eddc35a6f8cc745.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/6946c7d1a7da466dbc4f3ffa6611ee26.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/8d4d633f776744d1b8c6d74ef3141959.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/adb2e9d8795a48a0a26c562e698888ab.png)
(1)请作出平面α 截四棱锥S-ABCD的截面(只需作图并写出作法);
(2)当
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/84bbf96723804491ae02fadc0f43e20a.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572909286907904/1572909292961792/STEM/46f63ca628ae4394bf63c66e8ca85c76.png)
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名校
6 . 学习几何体结构素描是学习素描的重要一步.如图所示,这是一个用来练习几何体结构素描的石膏几何体,它是由一个圆柱
和一个正三棱锥
穿插而成的对称组合体.棱
和面
与圆柱侧而相切,点
是棱
与圆柱侧而的切点.直线
分别与面
,面
交于点
,圆柱
在面
,面
上分别截得椭圆
.在平面
和平面
中,椭圆
上分别有两组不重合的两点
和
(图中未画出).且满足关系
.已知三棱锥
的外接球表面积为
,圆柱的底面直径为
,请问平面
,平面
上是否分别存在点
,使得对于满足
的直线
分别恒过定点
.若存在,试求
和
夹角的余弦值:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270ddac9587bf1ea553914cb69595ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270ddac9587bf1ea553914cb69595ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d096cd7bd8a5a2219fd7dd166bbb8460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270ddac9587bf1ea553914cb69595ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d726b14a313e000a81526162f35748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d726b14a313e000a81526162f35748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c121f8f04b49c7036888316b5f35e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c121f8f04b49c7036888316b5f35e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8461e08e60b84222ef056f49e71fa20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad044057e3a5b2f033d9ad0006b6f50e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46bf815a5a193e9f5fc73078fb39d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357e0872d9e98d662a780e7686de86ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af67b85b1c91d1b489332503f6aaa8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37d0645be8436fa5c7a6ee8ba7de527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357e0872d9e98d662a780e7686de86ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefbad5a2e9e1e812b54c5e972cf98d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d1e25f3c8094bf9da6eabef95e8214.png)
![](https://img.xkw.com/dksih/QBM/2024/1/13/3410267677220864/3410816027746304/STEM/273256e47234495eaf4d1e8d41ba7a4a.png?resizew=183)
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名校
7 . (1)如图,已知正方体
的棱长为2,点
、
分别是正方形
和正方形
的中心,画出过点
、
、
的截面并求出其面积;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/ed4b38c1-6a5a-4dec-9605-b3600ad4c374.png?resizew=323)
(2)在四面体
中,
,
,
、
分别是
、
的中点,且
,求
与
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebecdc0f0f815ff0083d85d3f539b36d.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2234efe0c58d9b932223bb04a50e6909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/ed4b38c1-6a5a-4dec-9605-b3600ad4c374.png?resizew=323)
(2)在四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6609cc372831939ad4beb3770b0b0ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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名校
解题方法
8 . 已知长方体
中,
分别是
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/5cd9d1d2-eee6-4ea8-8a48-cde67f7d5390.png?resizew=149)
(1)画出直线
与平面
的公共点
.(保留辅助线,无需说明理由)
(2)若
,
与平面
所成的角大小为
,求异面直线
与
所成角的大小(精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/5cd9d1d2-eee6-4ea8-8a48-cde67f7d5390.png?resizew=149)
(1)画出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c79e56bc6f1db8f446fc5bd34a08865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1008a3fc217ce647e16fa09e42ceadb1.png)
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19-20高一·浙江杭州·期末
解题方法
9 . 如图,已知几何体的三视图(单位:cm).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/d92171d8-84e8-4169-9284-42c4b026015e.png?resizew=268)
(1)画出这个几何体的直观图(不要求写画法);
(2)求这个几何体的表面积及体积;
(3)设异面直线
、PD所成角为
,求
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/d92171d8-84e8-4169-9284-42c4b026015e.png?resizew=268)
(1)画出这个几何体的直观图(不要求写画法);
(2)求这个几何体的表面积及体积;
(3)设异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e935bb9d7b7115429edbd1e7469af65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
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10 . 已知在四棱
中,底面ABCD是矩形,且
,
,
平面ABCD,F是线段BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ab8036f9-037e-4c19-8846-aec9740008c7.png?resizew=174)
求证:
;
若直线PB与平面ABCD所成的角为
,求二面角
的余弦值;
画出平面PAB与平面PDF的交线
不写画法
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf3746205daae4787d8e31d74ba79e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9fa8832f98b5418a7d75892f7951b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
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