解题方法
1 . 如图,四边形
中,
,且
,将其沿
折叠成四面体
,使得二面角
的大小为
,若该四面体的所有顶点在同一个球面上,则该球的表面积是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e362c36e8e1caabc60c719cd570f19c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ac3005d5ecd6d4cea0ce99a47ef3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/cb4c5f39-613f-4158-93ec-7620f627e7cd.jpg?resizew=286)
您最近一年使用:0次
解题方法
2 . 在平面四边形
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/10/26/3096068364754944/3096822741295104/STEM/3143b8db5807406db064821a0dfa7104.png?resizew=174)
(1)若
,求
的长;
(2)求四边形
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0b9bfe8fd089042642652595eb717c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5640c531110986a503de677715770e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6cd8db96ffb1fb0bf81e82172bd170.png)
![](https://img.xkw.com/dksih/QBM/2022/10/26/3096068364754944/3096822741295104/STEM/3143b8db5807406db064821a0dfa7104.png?resizew=174)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965339def0ed9d47085b27f4bbb48498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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2022-10-27更新
|
1791次组卷
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8卷引用:山西省忻州市2023届高三上学期10月质量监测数学试题
山西省忻州市2023届高三上学期10月质量监测数学试题河南省豫北中原名校大联考2022-2023学年高三上学期10月份大联考理科数学试题河南省豫北中原名校大联考2022-2023学年高三上学期10月份大联考文科数学试题(已下线)专题02 正余弦定理在解三角形中的高级应用与最值问题(精讲精练)-2(已下线)专题突破卷13 解三角形的图形归类(含中线、角平分线、高)-3(已下线)6.4.2 平面向量的应用(精讲)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)第09讲 解三角形中解答题4种基础题型(已下线)第14讲 解三角形中周长最大值及取值范围问题
名校
解题方法
3 . 已知
中,角
所对的边分别为
,满足
.
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946519122272256/2952191425781760/STEM/83958e9cd42246299d4e8218069a0b34.png?resizew=167)
(1)求
的大小;
(2)如图,
,在直线
的右侧取点
,使得
.当角
为何值时,四边形
面积最大.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1137d70c697d54f87e0f793a11583aa1.png)
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946519122272256/2952191425781760/STEM/83958e9cd42246299d4e8218069a0b34.png?resizew=167)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f89fd7ddc3277cf27230a12d60f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2022-04-06更新
|
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5卷引用:山西省运城市高中联合体2022届高三下学期第四次模拟数学(文)试题
名校
4 . 已知
的面积为
,且
.
(1)求角
的大小及
长的最小值;
(2)设
为
的中点,且
,
的平分线交
于点
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8dc9593540f52bfda1f5c4d0ec579.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c43f7ca25ae65ac6c4b57a42f166af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2020-04-17更新
|
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5卷引用:山西省运城市康杰中学2023届高三上学期期末数学试题