10-11高二下·重庆·期末
解题方法
1 . 如图所示,在斜边为AB的
中,过A作
平面
于M,
于N.
![](https://img.xkw.com/dksih/QBM/2011/3/24/1570058324918272/1570058330513408/STEM/69d794c1e83a44a5b10cc90e22ff37e1.png?resizew=184)
(1)求证:
面
;
(2)求证:
面
.
(3)若
,设
,试用
表示
的面积,当
取何值时,
的面积最大?最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefc12c61c95d8e36846a6aac1c9105b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f1e80016a20b2e8cbd88b3a29985908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ee42d7d94bc89c0ee62c61b475b6eb.png)
![](https://img.xkw.com/dksih/QBM/2011/3/24/1570058324918272/1570058330513408/STEM/69d794c1e83a44a5b10cc90e22ff37e1.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad50b21465d85a77f48acf4ca7e6c951.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a4950a6e4202efd609507964af238b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096727a1bc7ffa667e16ece427c88384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad50b21465d85a77f48acf4ca7e6c951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
您最近一年使用:0次
2 . 在如图所示的多面体中,四边形
和
都为矩形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/08e60bae-4c50-46a1-80e2-691ec35ce1ed.png?resizew=169)
(Ⅰ)若
,证明:直线
平面
;
(Ⅱ)设
,
分别是线段
,
的中点,在线段
上是否存在一点
,使直线
平面
?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/08e60bae-4c50-46a1-80e2-691ec35ce1ed.png?resizew=169)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a7494edc88340385272679347b6af2.png)
您最近一年使用:0次
2016-12-03更新
|
6839次组卷
|
14卷引用:重庆市铜梁县第一中学2017-2018学年高二10月月考数学(理)试题
重庆市铜梁县第一中学2017-2018学年高二10月月考数学(理)试题2014年全国普通高等学校招生统一考试文科数学(四川卷)四川省乐山市十校2019-2020学年高二上学期期中数学(文)试题江西省山江湖协作体2019-2020学年高二上学期第三次月考(自招班)数学试题湖南省常德市石门县第二中学2018-2019学年高一下学期第一次月考数学试题山东省菏泽市2019-2020学年高一下学期期中考试数学试题A四川省阆中中学2020届高三全景模拟(最后一考)数学(文)试题江西省宜春市上高县第二中学2019-2020学年高二下学期期末考试数学(文科)试题(已下线)专题19 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅰ专版)云南省曲靖市第二中学2021届高三二模数学(文)试题河南省郑州市新密市第一高级中学2020-2021学年高二下学期期末数学文科试题(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点1 立体几何存在性问题的解法(一)【基础版】(已下线)专题23 立体几何解答题(文科)-3(已下线)【一题多解】存在与否 向量探索
真题
3 . 四棱锥S—ABCD中,底面ABCD为平行四边形,侧面SBC⊥底面ABCD,已知
∠ABC = 45°,AB=2,BC=
,SA=SB =![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)证明SA⊥BC;
(2)求直线SD与平面SAB所成角的大小.
∠ABC = 45°,AB=2,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)证明SA⊥BC;
(2)求直线SD与平面SAB所成角的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/7a2a847a-2350-4732-a70c-b146a0a8a808.png?resizew=167)
您最近一年使用:0次
2016-11-30更新
|
1863次组卷
|
5卷引用:重庆市缙云教育联盟2022-2023学年高二下学期期末数学试题
真题
4 . 如图,四棱锥
中,底面
为矩形,
底面
,
,点
是
的中点.
(1)证明:
平面
;
(2)若
,求二面角
的平面角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f235e99b0b55ac252c4b18cc315dc114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f06184f021ac21d72de1c7f55b0778.png)
![](https://img.xkw.com/dksih/QBM/2010/6/17/1569762502721536/1569762507636736/STEM/b712794a-6a41-4b0d-807a-6276157b5e22.png?resizew=143)
您最近一年使用:0次
2016-11-30更新
|
1685次组卷
|
4卷引用:2010年普通高等学校招生全国统一考试(重庆卷)数学(文科)
2010年普通高等学校招生全国统一考试(重庆卷)数学(文科)(已下线)2012届甘肃省西北师大附中高三第一次诊断文科数学试卷2016届山东省实验中学高三第一次模拟理科数学试卷2015-2016学年湖北沙市中学高二下第六次半月考理数学卷
解题方法
5 . 如图,三棱柱
中,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/5083663d-1cb1-4228-b690-5047b92c0628.png?resizew=228)
(1)求证:
平面
;
(2)若
,平面
平面
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4dfea6353fc25e88535e865a4982cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/5083663d-1cb1-4228-b690-5047b92c0628.png?resizew=228)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee5c0ab878cc4101575c479dad1b5a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba96e2f75ae659e366adfd6972660c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
2016-12-04更新
|
484次组卷
|
4卷引用:2016届重庆市一中高三下学期模拟文科数学试卷
13-14高二下·重庆·期中
6 . 如图,四棱柱
中,
.
为平行四边形,
,
,
分别是
与
的中点.
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571822781030400/1571822786707456/STEM/b1f46ab2b3f84c4ab15f53578af4d275.png)
(1)求证:
;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d4e9cbad4b5ee7d4dc2319bfca7d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77ea3c01a4f8db68aef920dbee9a64d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d175b40c419f4df37300864097364fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://img.xkw.com/dksih/QBM/2014/7/23/1571822781030400/1571822786707456/STEM/b1f46ab2b3f84c4ab15f53578af4d275.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69f14e7a4d944b370b16226c677e953.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b52352dd093ba732d0b666c30625500.png)
您最近一年使用:0次
12-13高三·湖北·阶段练习
名校
7 . 如图1四边形
中,
是
的中点,
将图1沿直线
折起,使得二面角
为60°.如图2.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959373361152/1572959379636224/STEM/9d6ae5f5c93441ac939c06f0af5049e5.png)
(1)求证:
;
(2)求直线
与平面
所成角的余弦值.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdaf03d0342a1b42393d5e41acacc39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d60dd8220ec310e2bb95d656b1877c2.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959373361152/1572959379636224/STEM/9d6ae5f5c93441ac939c06f0af5049e5.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96cb6d09a254cc2083bffaa10a7c619.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
2016-12-04更新
|
542次组卷
|
7卷引用:2015-2016学年重庆八中高二下第三次周考理科数学试卷
2015-2016学年重庆八中高二下第三次周考理科数学试卷(已下线)2013届湖北省八校高三第二次联考理科数学试卷(已下线)2014届上海交大附中高三数学理总复习二空间向量与立体几何练习卷【全国百强校】贵州省凯里市第一中学2018届高三下学期《黄金卷》第四套模拟考试数学(理)试题广东省汕头市潮阳实验学校2020届高三下学期3月第一次测试理科数学试题上海市浦东新区南汇中学2021-2022学年高二上学期10月月考数学试题(已下线)高二数学上学期【第一次月考卷】(测试范围:第10~11章)-2022-2023学年高二数学考试满分全攻略(沪教版2020必修第一册)
10-11高二下·重庆·阶段练习
解题方法
8 . P为正方形ABCD所在平面外一点,PA⊥面ABCD,AE⊥PB,求证:AE⊥PC.
![](https://img.xkw.com/dksih/QBM/2011/4/13/1570117697257472/1570117702549504/STEM/d72d8bd5-3051-4006-a27a-abb7d4c0ef13.png?resizew=177)
您最近一年使用:0次
9 . 如图,在三棱锥
中,
底面
,点
,
分别在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/57fcf6fd-7399-4ae0-96e5-11f792a852e8.png?resizew=157)
(Ⅰ)求证:
平面
;
(Ⅱ)当
为
的中点时,求
与平面
所成的角的大小;
(Ⅲ)是否存在点
使得二面角
为直二面角?并说明理由.
![](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/bf87a9d568ef3935c603efcfee863126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a078495ba47076ccaa28b46f765d80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/57fcf6fd-7399-4ae0-96e5-11f792a852e8.png?resizew=157)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(Ⅲ)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed479427d768bbf98c15141589109e1.png)
您最近一年使用:0次
2016-11-30更新
|
1832次组卷
|
6卷引用:2010-2011年重庆市完胜田家炳中学高二下学期检测数学试卷
(已下线)2010-2011年重庆市完胜田家炳中学高二下学期检测数学试卷2009年普通高等学校招生全国统一考试理科数学(北京卷)(已下线)2010年大连市第三十六中学高三高考压轴考试理科数学卷(已下线)2012届湖北省岳口中学高三模拟考试理科数学试卷二(已下线)2013届山东省淄川一中高三12月月考理科数学试卷【市级联考】安徽省定远重点中学2018-2019学年高二上学期第三次月考数学(理)试题
10 . 如图,在多面体
中,
平面
,且
是边长为2的等边三角形,
.
是线段
的中点,证明:直线
面
;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5ae16a7145a28a91d45ef950a07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0968b39e8d3a5146759340413571d0d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69dc003d123423886dba10b28b10b3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d3f5f4c4419913c1232b7aae03ade.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db1d8f228c87b65a3609f825fc441d5.png)
您最近一年使用:0次
2016-12-03更新
|
1551次组卷
|
3卷引用:重庆市部分学校2023-2024学年高一下学期5月月考数学试题