解题方法
1 . 在四棱锥P﹣ABCD中,平面PAC⊥平面ABCD,且有AB∥DC,AC=CD=DA
AB.
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462407061184512/2464016518381568/STEM/305865f2f3d24a47b4f8d2ed909d7421.png?resizew=180)
(1)证明:BC⊥PA;
(2)若PA=PC=AC,求平面PAD与平面PBC所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50a39604477d1d9326eb455cda2e838.png)
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462407061184512/2464016518381568/STEM/305865f2f3d24a47b4f8d2ed909d7421.png?resizew=180)
(1)证明:BC⊥PA;
(2)若PA=PC=AC,求平面PAD与平面PBC所成的锐二面角的余弦值.
您最近一年使用:0次
2 . 如图,在四棱锥
中,底面ABCD为直角梯形,其中
,
,
,
,E是AD的中点,AC和BE交于点O,且
平面ABCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/1a130ffa-4bdf-4674-9d55-b3625aa8e716.png?resizew=229)
(1)证明:平面PAC⊥平面PCD;
(2)求点D到平面PCE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4fecd8af72d3b50ddd2e35c656dc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/1a130ffa-4bdf-4674-9d55-b3625aa8e716.png?resizew=229)
(1)证明:平面PAC⊥平面PCD;
(2)求点D到平面PCE的距离.
您最近一年使用:0次
解题方法
3 . 在四棱锥
中,平面
平面ABCD,且有
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/296c9ec2-7619-4b62-bbf3-1cf9cc363791.png?resizew=198)
(1)证明:
;
(2)若
,Q在线段PB上,满足
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f2be91a28ebeef7b9e7789c9a163cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/296c9ec2-7619-4b62-bbf3-1cf9cc363791.png?resizew=198)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60964e720188e325eb18c9528b1fa95.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628474ee76c722708fcac2dc35376f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3764c14968ed67e0be113ad6b9cfbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aef45a3fcc6e34ece114d4315747a0f.png)
您最近一年使用:0次
名校
解题方法
4 . 如图1,在
中,
,
,
为
的中点,将
沿
折起,得到如图2所示的三棱锥
,二面角
为直二面角.
(1)求证:平面
平面
;
(2)设
分别为
的中点,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c1af34ae42bf76850f0471b4a569d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddda8bee262f17d51ee3d70cf63d6b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/efb0a5a9-1430-494d-9a45-93c67b60781f.png?resizew=400)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6476880c8c4a6a9c1883d6fbb42cd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c539709f3b8449ef9cd00a86e194c099.png)
您最近一年使用:0次
2020-05-04更新
|
335次组卷
|
5卷引用:2020届广东省湛江市普通高考测试(一)数学(理)试题
2020届广东省湛江市普通高考测试(一)数学(理)试题(已下线)黄金卷11-【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(江苏专用)(已下线)2021年高考数学押题预测卷(江苏专用)02(已下线)专题24 盘点立体几何中折叠问题——备战2022年高考数学二轮复习常考点专题突破河北省石家庄市第一中学2021-2022学年高二上学期期中数学试题
解题方法
5 . 如图,在三棱柱
中,侧面
底面
,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/b559d160-d672-40b3-b126-846584cf1097.png?resizew=216)
(1)求证:
∥平面
;
(2)若
,
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f31a3724c639f88486f8356ca65397.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/b559d160-d672-40b3-b126-846584cf1097.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe97f2b5d04e845209b7c9837e1394d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f6626a82e7590b286f0b4a4f272518.png)
您最近一年使用:0次
2020-05-04更新
|
245次组卷
|
2卷引用:2020届广东省湛江市普通高考测试(一)数学(文)试题
6 . 已知
,
是椭圆
的左右焦点,椭圆与
轴正半轴交于点
,直线
的斜率为
,且
到直线
的距离为
.
(1)求椭圆
的方程;
(2)
为椭圆
上任意一点,过
,
分别作直线
,
,且
与
相交于
轴上方一点
,当
时,求
,
两点间距离的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b0dadb875cccce870b69409a476606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbad65b3d744b70da2480eee1cdb587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbad65b3d744b70da2480eee1cdb587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6fb6730ea909d0786fdd0043b5893a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解题方法
7 . 如图,已知多面体
中,四边形
为矩形,
底面
,
,
,
,M为
的中点.
![](https://img.xkw.com/dksih/QBM/2020/5/1/2453476557225984/2454083330719744/STEM/9c54a8d86a0d44e2bf1aa9ab2fedcbd4.png?resizew=224)
(1)
与
相交于点O,证明:
平面
;
(2)若
,
,
,求该多面体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.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/dd182e26dbd32212e9842057093d468c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7579755d7d17bd72d97b03df323aefa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e35341edb5c416145bf3b88462db30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/5/1/2453476557225984/2454083330719744/STEM/9c54a8d86a0d44e2bf1aa9ab2fedcbd4.png?resizew=224)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75844725734f498eb983fe76cece2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d93daae6ec80968c0630e229c1fa1b84.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9260ee90b4107dcdc5b2b0937c40e8c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844b54fac727753d81a6be086330c9e9.png)
您最近一年使用:0次
解题方法
8 . 如图,在正四棱锥
中,
,
,
为
上的四等分点,即
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/cef80de8-38d1-43f9-888c-c2db96b5a0af.png?resizew=134)
(1)证明:平面
平面
;
(2)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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799eb4b34586b807b0042aaa57ac5b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c40a54efbaf9506bef09f841458124.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/cef80de8-38d1-43f9-888c-c2db96b5a0af.png?resizew=134)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec89c4d9a43c9d4f7e0ddcfe0a9360b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
您最近一年使用:0次
2020-04-14更新
|
473次组卷
|
4卷引用:2020届广东省梅州市高三高考一模数学(理)试题
(已下线)2020届广东省梅州市高三高考一模数学(理)试题2020届广东省梅州市高三总复习质检(5月)数学(理)试题2020届京师AI联考高三质量联合测评(二)理科数学(A卷)试题安徽省名校联考2022届高三下学期教育教学质量监控理科数学试题
9 . 如图,已知四边形
是边长为
的菱形,
平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c707f0202ec1aa233e1eeacc7a4587d.png)
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d4e2448cf3a1330d0548c0d9531c75.png)
![](https://img.xkw.com/dksih/QBM/2020/4/12/2440065365360640/2440104644075520/STEM/02ad5e8a5b3744339ce94c1739d0f561.png?resizew=189)
(1)求证:平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b487550f5754953120b76ac6cf4d60ff.png)
(2)若四边形
为直角梯形,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2436b61e6f537d5aa95ab5acfcf06ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e09e045bbd617f55327c1585cd837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c707f0202ec1aa233e1eeacc7a4587d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68dfd32a77c3615069ad1e7eb5b226a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d4e2448cf3a1330d0548c0d9531c75.png)
![](https://img.xkw.com/dksih/QBM/2020/4/12/2440065365360640/2440104644075520/STEM/02ad5e8a5b3744339ce94c1739d0f561.png?resizew=189)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f5ba965420dfd5aa4da211682df096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b487550f5754953120b76ac6cf4d60ff.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1507da3daed983c2f355d4caebb66d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea542c31170157c0e9b9e8b65a95437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7495688c046142f688c822209c0e968e.png)
您最近一年使用:0次
2020-04-12更新
|
439次组卷
|
2卷引用:广东省广州市2019-2020学年高三下学期调研考试数学(文)试题
10 . 如图,三棱锥
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/6c556b48-2a36-4734-93f0-de6083270242.png?resizew=271)
(1)求证:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611b0b42afa0c08caa344010bfef71d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7ef4110fae5a764bcab20ee4ab4a69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/6c556b48-2a36-4734-93f0-de6083270242.png?resizew=271)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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