1 . 如图,在各棱长均为
的三棱柱
中,侧面
底面
,且
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/d6dfc964e4d14bc583e9fa4db50eec81.png)
(Ⅰ)求证:平面
平面
;
(Ⅱ)求二面角
的大小.
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/773a7a8142754a1aaeceaa66bae5c476.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/9bc2643b127542189a32a35985caa967.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/63749eef936e4e19a3f29a4601a921ee.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/b7ef94234e70451da98147c492fcb630.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/221dd8c315384e18ba8d8bc2ff4d76a1.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/9dbb172c348042849a0353ef12d73e06.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/e7d19a46aac845999d3a61af793e109a.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/d6dfc964e4d14bc583e9fa4db50eec81.png)
(Ⅰ)求证:平面
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/6d2c87a301004edcaf4db21026e23418.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/7dcfa44888864852b7f0a410f46d4d90.png)
(Ⅱ)求二面角
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572856586625024/1572856592433152/STEM/13fe5275b3db4a3da2ca9317d66fac82.png)
您最近一年使用:0次
2 . 如图,在四棱柱P-ABCD中,底面ABCD是矩形,E是棱PA的中点,PD⊥BC.
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572853206958080/1572853212971008/STEM/a13b237cb40048bd84263b7669b031db.png)
求证:(Ⅰ)PC∥平面BED;
(Ⅱ)△PBC是直角三角形.
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572853206958080/1572853212971008/STEM/a13b237cb40048bd84263b7669b031db.png)
求证:(Ⅰ)PC∥平面BED;
(Ⅱ)△PBC是直角三角形.
您最近一年使用:0次
2016-12-04更新
|
232次组卷
|
2卷引用:2015-2016学年四川省雅安市天全中学高二下期中文科数学试卷
3 . 已知某几何体的三视图和直观图如图所示,其正视图为矩形,侧视图为等腰直角三角形,俯视图为直角梯形.
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572847208636416/1572847341256704/STEM/e6e6098bd70048abb089a8ee5ff7d745.png)
(Ⅰ)求证:
;
(Ⅱ)设
为
中点,在棱
上是否存在一点
,使
平面
?若存在,求
的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572847208636416/1572847341256704/STEM/e6e6098bd70048abb089a8ee5ff7d745.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdfee2ced42c112abaf4383979f14154.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85dc38bb16aee061f6a96fc3e86d93af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2137bd5707a3c613ed664b748ed528d0.png)
![](https://img.xkw.com/dksih/QBM/2016/6/30/1572847208636416/1572847341256704/STEM/94f88f594dfd40d9a9e47e52d08b9e26.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,底面
为菱形,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572844375056384/1572844381347840/STEM/1ad7a94d-ddc1-437e-9569-a63b6cad6738.png?resizew=281)
(1)若
,求证:平面
平面
;
(2)点
在线段
上,
,若平面
平面
,且
,求平面
与平面
夹角的大小.
![](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/b86db010859f7a243badec02946a4e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572844375056384/1572844381347840/STEM/1ad7a94d-ddc1-437e-9569-a63b6cad6738.png?resizew=281)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845b8505cb7b7b8df5753f52a4e00462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47768bee81ee0c6fbc41e3fdeb22cc.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/931bbffda5e872703c9947eccc47ede2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e9850904cb6d52d2294b7acbedf418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487919e07e1b653a14b9e2d53a03a1bc.png)
您最近一年使用:0次
2016-12-04更新
|
402次组卷
|
3卷引用:2015-2016学年天津市静海一中等六校高二上学期期末理科数学卷
5 . 如图,在直三棱柱
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/6/23/1572820601487360/1572820607746048/STEM/d565fa754d5a49cfa56b7e74b1ef9424.png)
(1)求证:
平面
;
(2)若
,
,
,求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.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/2016/6/23/1572820601487360/1572820607746048/STEM/d565fa754d5a49cfa56b7e74b1ef9424.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e199a5d02bfb5b869221e61d31969bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e367b683581c7cbe018078168f69efc5.png)
您最近一年使用:0次
6 . 如图,长方体
中,
,
,
是
中点,
是
中点.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550017024/STEM/868ab7ae149d4674a169e808803ace64.png)
(Ⅰ)求证:
;
(Ⅱ)求证:平面
⊥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0e44cb429eea46e7ee4320147192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572708543799296/1572708550017024/STEM/868ab7ae149d4674a169e808803ace64.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aebe1feb012fa6b4b84657dea033a4.png)
(Ⅱ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4042e36f20ccd3c1f02c864230e8a277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2095691cd6e3e50722061cbc0bb648.png)
您最近一年使用:0次
7 . 如图,四棱锥
中,底面
为平行四边形,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/c3aa3e6f3ad44cf7abae58c958746ed9.png)
(1)证明:
∥平面
;
(2)若底面
为矩形,三棱锥
的体积
,求二面角
的正切值.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/94dca970db6a451abdb820e302654e54.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/d35bb749f47844608391b3fe08e1a37a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/88d1c4e8353b4ba3ba896d4044207024.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/0a7321be47cf41e3a50577b5ea3ccdad.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/1f419ef9308c416cb19024f9ebf488f1.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/d57a8333efed44c992925939015d7bf9.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/c3aa3e6f3ad44cf7abae58c958746ed9.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/226935a9908c45e580c8f7357c210736.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/b9a6f7478f8643858c3e1bf767272bea.png)
(2)若底面
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/d35bb749f47844608391b3fe08e1a37a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/8543d5ae8a994fbfbee6ef7586468b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63d22f5172eebabd077e24726c3d230.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801636864/STEM/0e06d16037034882a7307d7032508176.png)
您最近一年使用:0次
8 . 如图所示,在正方体
中,
是
上一点,
是
的中点,
⊥平面
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/76f477f91b854739a2a0f9349026e123.png)
(1)求证:![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/407b20497f4646598d4989c6d4d8342d.png)
(2)求
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/79d09193b9ff469ca24e2e710dd178b0.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/0c16a810b18a47439fb8ca80062e2ea9.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/0cc576213ca44c2a8743779b0091b1e0.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/9cc1b312ec3d4af09f72754290172dc3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/7e1a152514294c1fbc1ba55ceeee5fe1.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/260eedce0f93460ea5df79ac104c3a71.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/76f477f91b854739a2a0f9349026e123.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/407b20497f4646598d4989c6d4d8342d.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/7e1a152514294c1fbc1ba55ceeee5fe1.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801604096/STEM/f159bea7f37c4b058007dddaeb30103a.png)
您最近一年使用:0次
9 . 如图,在四棱锥
中,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/3c65318ca8ee4363a2ab23abd308473c.png)
(1)求异面直线
所成角的正切值;
(2)求证:
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/77c6416ac5934aab85da60f49a7cdf8a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/5d27da1794cd4adb94bdf0f23d9ee231.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/989366ad98d34974a8be7095f3113e3a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/ba0066dc0d0646349a5e6101fc1a2d86.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/247ff5548d9d47e7864083b518f1b8ac.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/28414a3efa664b9aa7373f1d779541fc.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/3c65318ca8ee4363a2ab23abd308473c.png)
(1)求异面直线
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/62f4df8078c34748b005d9fb8b113f78.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572707795550208/1572707801579520/STEM/6638f797749943eabc580464e8de195b.png)
您最近一年使用:0次
10 . 如图,在斜三棱柱
中,侧面
是边长为
的菱形,
.在平面
中,
,
,
为
的中点,过
,
,
三点的平面交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572701048307712/1572701054599168/STEM/67627bd85579496ca7261e1a289f3624.png)
(1)求证:
为
中点;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee56874296cdf9d04b9e870b14646d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afede67e803c1ab6210464d3948a438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1342371d8582185ffeabd657f7288727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acb7a56f3631b1217e8c53d6d583bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bef8154e79155a4427b3381027c3900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8091f4a33fa4841047f652794f98f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fd8d63df90bc7e78b35ed0eaddb221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0654ae4e6447b8e158aafb2f9770e55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febb0e53890d2fb72fdfd7f0aa88acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f92c0005348ac35069a9fd56068da81.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572701048307712/1572701054599168/STEM/67627bd85579496ca7261e1a289f3624.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f92c0005348ac35069a9fd56068da81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febb0e53890d2fb72fdfd7f0aa88acc.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057d833a7b94f543d1bc64a12451d8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afede67e803c1ab6210464d3948a438.png)
您最近一年使用:0次