1 . 点
是
斜边
上异于
的一动点,
,连结
,将
沿着
翻折到
,使
与
所在平面构成直二面角,则翻折后
的最小值是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d00b288e4e8238650ad54aa5e71584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42fc4d7ceda13770442ace302f56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42fc4d7ceda13770442ace302f56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbced129627233661d88e9663a9e13c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
您最近一年使用:0次
解题方法
2 . 如图,在平行四边形
中,
,
,
为边
的中点,将
沿直线
翻折成
,设
为线段
的中点.则在
翻折过程中,给出如下结论:
![](https://img.xkw.com/dksih/QBM/2020/5/23/2469012014833664/2470962773581824/STEM/363ca60de3e24603a8bbb6956334429c.png?resizew=252)
①当
不在平面
内时,
平面
;
②存在某个位置,使得
;
③线段
的长是定值;
④当三棱锥
体积最大时,其外接球的表面积为
.
其中,所有正确结论的序号是______ .(请将所有正确结论的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/2020/5/23/2469012014833664/2470962773581824/STEM/363ca60de3e24603a8bbb6956334429c.png?resizew=252)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
②存在某个位置,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
③线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
④当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1290b2fd10d49337a7420fc368cfea75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f4c86860463eae0869a93972494bd9.png)
其中,所有正确结论的序号是
您最近一年使用:0次
2020-05-26更新
|
840次组卷
|
2卷引用:2020届四川省攀枝花市高三第三次统一考试数学(理)试题
名校
解题方法
3 . 在三棱锥
中,已知
平面
,且
为正三角形,
,点
为三棱锥
的外接球的球心,则点
到棱
的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc13307a688f0820d9bc8b946b04b7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
您最近一年使用:0次
2020-05-13更新
|
1199次组卷
|
8卷引用:2020届广西柳州市高三毕业班4月模拟(三模)文科数学试题
名校
解题方法
4 . 已知球
的球面上有四点
、
、
、
,其中
、
、
、
四点共面,
是边长为
的正三角形,平面
平面
,则棱锥
的体积的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448cbac9a1ef3de7538a6b30cdc39582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
您最近一年使用:0次
2020-04-30更新
|
180次组卷
|
4卷引用:四川省宜宾市叙州区第二中学校2019-2020学年高二下学期第四学月考试数学(文)试题
四川省宜宾市叙州区第二中学校2019-2020学年高二下学期第四学月考试数学(文)试题安徽省马鞍山市第二中学2018-2019学年高二下学期期末数学(文)试题(已下线)文科数学-2020年高考押题预测卷03(新课标Ⅰ卷)《2020年高考押题预测卷》(已下线)专题16 几何体的体积-2020年高考数学(文)母题题源解密(全国Ⅲ专版)
5 . 已知
为正方形,
为平面
外一点,
,
,二面角
为60°,则
到
的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15eae3c2cb4274a947f6a011960934d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399d731913a563e291b817831a0c678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
6 . 已知圆锥的顶点为
,过母线
、
的切面切口为正三角形,
与圆锥底面所成角为
,若
的面积为
,则该圆锥的侧面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e49817548cb45b3d1e58570644c6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
您最近一年使用:0次
2020-04-26更新
|
473次组卷
|
3卷引用:2020届四川省宜宾市高三第二次诊断检测数学(文科)试题
2020届四川省宜宾市高三第二次诊断检测数学(文科)试题(已下线)第31练 直线、平面垂直的判定与性质-2021年高考数学(文)一轮复习小题必刷沪教版(2020) 必修第三册 精准辅导 第11章 11.2(3)锥体的表面积
名校
解题方法
7 . 如图所示,在直角梯形
中,
,
、
分别是
、
上的点,
,且
(如图①).将四边形
沿
折起,连接
、
、
(如图②).在折起的过程中,则下列表述:
平面
;
②四点
、
、
、
可能共面;
③若
,则平面
平面
;
④平面
与平面
可能垂直.其中正确的是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4bc8ae79524e8f6ede68f1c2fa3c7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f2275cfc3cc50b92b16288db72cfe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
②四点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1be2a5bfe8bab50cb68fe52d0f92ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2020-04-14更新
|
1807次组卷
|
8卷引用:2020届四川省宜宾市高三第二次诊断测试理科数学试题
2020届四川省宜宾市高三第二次诊断测试理科数学试题广东省广州市天河外国语学校2019-2020学年高三下学期线上测试数学(理)试题黑龙江省牡丹江市第一高级中学2019-2020学年高一下学期6月月考数学试题(已下线)【新教材精创】11.5综合复习习题课(2)练习(1)内蒙古赤峰市松山区2020-2021学年高三第一次统一模拟考试文科数学试题(已下线)第29练 空间点、线、面的位置关系-2021年高考数学(文)一轮复习小题必刷(已下线)第十一章 立体几何初步 本章小结(已下线)8.6.3平面与平面垂直——课后作业(提升版)
名校
8 . 三棱锥
中,点
是
斜边
上一点.给出下列四个命题:
①若
平面
,则三棱锥
的四个面都是直角三角形;
②若
,
,
,
平面
,则三棱锥
的外接球体积为
;
③若
,
,
,
在平面
上的射影是
内心,则三棱锥
的体积为2;
④若
,
,
,
平面
,则直线
与平面
所成的最大角为
.
其中正确命题的序号是__________ .(把你认为正确命题的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f7e633fb547fd821e5a3cbf1bd1f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6deecf9ccb7b7879455050633219e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f479c521ce8a3e0013347d39a7d16e0.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ecf4712f4ce3a52ccc695c1774cbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f643db1101c352132c1d670e9cb30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4aca03910382accfe738520daf689c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
其中正确命题的序号是
您最近一年使用:0次
2020-04-13更新
|
402次组卷
|
3卷引用:2020届湖北省黄冈中学高三下学期4月高考模拟测试数学(理)试题
9 . 在棱长为1的正方体
中,点
分别为线段
、
的中点,则点
到平面
的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a681d311a864d38cf306a0c137cbcca.png)
您最近一年使用:0次
2020-04-08更新
|
609次组卷
|
4卷引用:2020届四川省绵阳市高三4月线上学习评估数学(理)试题
2020届四川省绵阳市高三4月线上学习评估数学(理)试题2020届四川省绵阳市高三4月线上学习评估数学(文)试题考点13 空间点、线、面的位置关系-2020年【衔接教材·暑假作业】新高三一轮复习数学(文)(已下线)重难点09五种空间向量与立体几何数学思想-1
名校
解题方法
10 . 已知平面内一正六边形
的边长为
,中心为点
将该正六边形沿对角线
折成二面角
,则当二面角
的平面角余弦值为
时,三棱锥
的外接球表面积为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dead389315b2c062227aa877c5e486d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6d5aaf764583992b9ec1e7dea8f5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6d5aaf764583992b9ec1e7dea8f5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306f15a0a3e4a9acce93f693b1156eae.png)
您最近一年使用:0次
2020-04-06更新
|
583次组卷
|
8卷引用:四川省泸州市泸县第二中学2020届高三下学期第四次学月考试数学(文)试题
四川省泸州市泸县第二中学2020届高三下学期第四次学月考试数学(文)试题四川省泸州市泸县第二中学2020届高三下学期第四次学月考试数学(理)试题云南师范大学附属中学2019-2020学年高三适应性月考(六)数学(文)试题云南师范大学附属中学2019-2020学年高三高考适应性月考(六)数学(理)试题云师大附中2019-2020学年高三高考适应性月考(六)数学(理)试题(已下线)湖南省长沙市雅礼中学2024届高三上学期月考(二)数学试题变式题15-18(已下线)第二章 立体几何中的计算 专题六 几何体的外接球、棱切球、内切球 微点13 多边形折叠成二面角模型【基础版】(已下线)第5题 立体几何中以外接球为背景的最值问题(压轴小题)