1 . 已知四边形
是由
与
拼接而成,如图所示,
,
.
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9e37588440c6beb0889962ba936821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6363d761828ad84619e6dda1c1cf3cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/21/108a475c-be39-4d44-9a83-f70f460ab28f.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ab48da8fcb9c375d3ff3e216ef7724.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2023-06-18更新
|
680次组卷
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5卷引用:甘肃省武威市天祝一中、民勤一中、古浪一中2022-2023学年高一下学期期中数学试题
甘肃省武威市天祝一中、民勤一中、古浪一中2022-2023学年高一下学期期中数学试题河南省开封市五县2022-2023学年高一下学期期中考试数学试题江苏省盐城市响水县清源高级中学2022-2023学年高一下学期期中数学试题(已下线)考点巩固卷11 解三角形(九大考点)(已下线)第11章 解三角形 章末题型归纳总结(1)-【帮课堂】(苏教版2019必修第二册)
名校
2 . 如图,在四边形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417f84f30434c00de70bc6c88491091a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a438b3860a1eba6d2b28511f8dd76af.png)
(1)求
的正弦值;
(2)若
,且△
的面积是△
面积的4倍,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417f84f30434c00de70bc6c88491091a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a438b3860a1eba6d2b28511f8dd76af.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b44862f180cd0a2da89e7b24716305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2019-11-04更新
|
2160次组卷
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6卷引用:甘肃省武威第六中学2020-2021学年高三上学期第四次过关考试数学(理)试题
名校
3 . 在平面四边形
中,已知
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/de5ec516-2dc8-4b7f-8684-b378422bebb0.png?resizew=206)
(1)求
;
(2)求
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be58ea6ca37a850422631eb3e994d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd7f0ea2f16a74c4ac40ca4ba79722f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c016262f7c32817de8cb270fc9244f5b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/de5ec516-2dc8-4b7f-8684-b378422bebb0.png?resizew=206)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
您最近一年使用:0次
2020-04-20更新
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1407次组卷
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9卷引用:2020届甘肃省武威第六中学高三下学期第三次诊断考试数学(理)试题
2020届甘肃省武威第六中学高三下学期第三次诊断考试数学(理)试题山东师范大学附属中学2019-2020学年高三4月线上模拟数学试题2020届山东省平邑县第一中学高三下学期第五次调研考试数学试题山东省潍坊高密市2020届高三模拟数学试题一河北省石家庄市辛集市第一中学2021届高三上学期九月月考数学试题陕西省宝鸡市长岭中学2020-2021学年高三上学期期中理科数学试题(已下线)必刷卷04-2021年高考数学考前信息必刷卷(山东专用)江苏省南通市海门市2020-2021学年高三上学期期末数学试题(已下线)期中测试(B卷提升卷)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材苏教版)