如图,三角形
所在的平面与长方形
所在的平面垂直,
,
,
.
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572138642317312/1572138647937024/STEM/ab59150e-3610-402e-b4be-805aa116adda.png?resizew=171)
(1)证明:
平面
;
(2)证明:
;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae363146bb57d55b1fe84f08115dba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4a1dc86ec008a976874c72f84c45c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5142708254cf9157e1d1d568c63b0c50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afbbcd87f63f6b2c050e265fd992a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d797446c13984c47ae58a297419575.png)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572138642317312/1572138647937024/STEM/ab59150e-3610-402e-b4be-805aa116adda.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9e7c3e31d02f3c4b84ee8a3abdc9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2855a7a1241c673bb8ffa9d66c0f22d0.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e39a9d86d76caff7ba7111208eae5e.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2855a7a1241c673bb8ffa9d66c0f22d0.png)
2015·广东·高考真题 查看更多[8]
2015年全国普通高等学校招生统一考试文科数学(广东卷)【全国百强校】北京市人大附中2018届高三5月考前热身练习(三模)数学文科试题北京市人大附中2018届高三下学期三模考试数学(文科)试题(已下线)第01章 章末检测-2018-2019版数学创新设计课堂讲义同步系列(苏教版必修2)四川省峨眉第二中学校2021-2022学年高二下学期5月月考文科数学试题(已下线)第02讲 玩转立体几何中的角度、体积、距离问题-【暑假自学课】2022年新高二数学暑假精品课(苏教版2019选择性必修第一册)(已下线)专题23 立体几何解答题(文科)-3专题32立体几何与空间向量解答题(第二部分)
更新时间:2019-01-30 18:14:09
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图四棱锥
,
平面
,四边形
是矩形,点
为侧棱
的中点,过
三点的平面交侧棱
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/a0fa1485-39d4-4276-b7d0-d7dd0997db2c.png?resizew=176)
(1)求证:点
为侧棱
的中点;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31f2c38f83654eeff21a571a817fd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/a0fa1485-39d4-4276-b7d0-d7dd0997db2c.png?resizew=176)
(1)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c15fb8fc3239d45bd4e7d8971f58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356702fd861f76c16f55945151b9f21d.png)
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解题方法
【推荐2】如图,在直三棱柱
中,
是
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494643467722752/2494920568037376/STEM/65c002ef7d0a4d31978ddc3fcba4bf37.png?resizew=183)
(Ⅰ)证明:
平面
;
(Ⅱ)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af052c9203aa2e8db5bddc1420a7ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ceac8e9bb00b2e1cc8e0bfe10566a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e20c1b7f55cd8e68a7c3aa58bc944c5.png)
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494643467722752/2494920568037376/STEM/65c002ef7d0a4d31978ddc3fcba4bf37.png?resizew=183)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4fcf607b0710d12aaabd17fd053d83.png)
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【推荐1】如图,在三棱锥PABC中,
底面ABC,
,
,
,D,E分别是AC,PC的中点,F是PB上一点,且
,M为PA的中点,二面角
的大小为45°.
![](https://img.xkw.com/dksih/QBM/2020/5/27/2471780658536448/2472300403286016/STEM/afb26b69e2374b31bb767bd8d38d1c76.png?resizew=171)
(1)证明:
平面AEF;
(2)求直线AF与平面BCM所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828795d52174dd64fba1c9ebe61072b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70682f6196e6c1a08eb48da73e8919ca.png)
![](https://img.xkw.com/dksih/QBM/2020/5/27/2471780658536448/2472300403286016/STEM/afb26b69e2374b31bb767bd8d38d1c76.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f306ff6d237cd9d847aa109acf9333d7.png)
(2)求直线AF与平面BCM所成角的正弦值.
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【推荐2】在正三棱柱
中,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/90ac46e4-a6d2-4335-bd1e-e9a7a90e085d.png?resizew=155)
(1)求证:
//面
;
(2)设
是棱
上的点,且满足
.求证:面
面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/90ac46e4-a6d2-4335-bd1e-e9a7a90e085d.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5888bec948373f3854258ad80171073d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed990271713e2d0ee431ce152f0b6d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe22d526d1da4d61436c59e7517328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
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【推荐3】如图,D为圆锥DO的顶点,O为圆锥底面的圆心,AB为直径,C为底面圆周上一点,四边形OAED为正方形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/9a159a10-63e7-487f-a275-232653031688.png?resizew=152)
(1)若点F在BC上,且
//面ACE,请确定点F的位置并说明理由;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e20c1b7f55cd8e68a7c3aa58bc944c5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/9a159a10-63e7-487f-a275-232653031688.png?resizew=152)
(1)若点F在BC上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c3762eb09409441a1d1d7c0ccbbe60.png)
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【推荐1】在如图所示的几何体中,四边形
是菱形,
是矩形,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/1f204f70-f403-4a96-ae0a-eed7c3a4f92a.png?resizew=179)
(1)平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
(2)求点
到平面
的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9621a5bf82a3af202b3cf6c197f431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394541049e3a8d9c2f6f55cd4b146fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6383ebd3154b07853d18959c5c8495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8fb795255d80c8198c5a8085cf0bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15c0455b365fa5d12e8b726e319da2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61588617d22abd00af4ca489bb3a8787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/1f204f70-f403-4a96-ae0a-eed7c3a4f92a.png?resizew=179)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a76f50bd52fb5a4e5fde1dab088b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61588617d22abd00af4ca489bb3a8787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa23b9082c159c7e2c37505ea69ddd2.png)
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【推荐2】在四棱锥
中,底面
是矩形,
,
,且
底面
,
是
中点.
(1)求点
到平面
的距离;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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【推荐3】如图,在三棱锥
中,
平面
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91ac38719ac70e0597a72e7f0deceac.png)
.
(1)求点
到平面
的距离;
(2)设点
为线段
的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0595498034037b58538f8056dbc6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91ac38719ac70e0597a72e7f0deceac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd516e4b396722941982a389ee6e524c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/a1dcce74-de00-4502-b86e-200dd621794c.png?resizew=109)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0f73cf7ab0c2a8a0099cb2873c81f4.png)
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