名校
解题方法
1 . 在
中,角
对应的边分别为
,已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
______ ,
的面积为______ .
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d12de0fe32eedb8fab4fd3a50dfa7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2bc8adc993cad5553d66285b5971f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
解题方法
2 . 学习以下过程:若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35426df35d0b2eae48af24f5e029b8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fc32806172f394bbde81797aefcd82.png)
,完成下面题目:已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c96adab43f4e12950ff28ec902e9993.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1018d072c74bd0f5f013002751e16668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fda0241d8ec426980f1d0d952e7eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35426df35d0b2eae48af24f5e029b8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fc32806172f394bbde81797aefcd82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113d9ba315ee03796ed4993d823bf855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd40ca9cbe17fe92d0e9f1f1c8cacf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a18cb53580e8d0e288de7ede303fc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c96adab43f4e12950ff28ec902e9993.png)
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3 . 在
中,角
所对的边分别为
,已知
,则
的面积为______________ .
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6458e699d287daf5c8c3a9b1b7d14abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
4 . 我国著名的数学家秦九韶在其著作《数书九章》中,提出了已知三角形三边长求三角形面积的公式,可以看出我国古代已经具有很高的数学水平.设
分别为
内角
的对边,
表示
的面积,其公式为
.若
,
,则
的面积
为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](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/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b36572f8eb91a6e41f4cb0866f7c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c4a202877be182b8d5aa103c5ba34e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2626066eda9b51f94a3b3b200582c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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5 . 如图,在平面四边形
中,
,对任意实数
都有
,若
为
的面积,且
,
,则
的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6cd645dc20fe84351409216b01fc97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130fca17859fc262f24ea769537c6468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61fda819f0b890ee07fae86000b8915d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解题方法
6 . 在△ABC中,内角A,B,C的对边分别为a,b,c,
.若
,
,则△ABC的面积为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bddbb0fe305bf2b041f076f46c885e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
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7 . 在
中,
,
,其内切圆半径为
,则其外接圆半径为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d25b20f93566793ecf9baeaa30de71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1466856bf2570685d3629c1f813748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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8 . 在
中,
在边
上,且
平分
,若
,则
的长为_____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc4d6a2ca3def2f7bbe008daa972336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f89fd7ddc3277cf27230a12d60f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2024-03-06更新
|
557次组卷
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2卷引用:四川外语学院重庆市第二外国语学校2023-2024学年高一下学期期中考试数学试题
名校
解题方法
9 . 已知△ABC的面积为1,且AB=2BC,则当AC取得最小值时, BC的长为________ .
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2023-11-18更新
|
902次组卷
|
6卷引用:重庆市巴蜀中学2024届高考适应性月考卷(四)(期中)数学试题
名校
解题方法
10 . 某同学在查阅资料时,发现一个结论:已知O是
内的一点,且存在
,使得
,则
.请以此结论回答:已知在
中,
,
,O是
的外心,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6775bea8fabfdc16ca55ceb1e6f8ba4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a9c6bcfb1f63e1e57cccbcfb07e885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844f65ab3bba2ca34cd53d84b148c277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdaf0d5ffc528a3cd85c79e3317c440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10072660396c4821badfd7311389e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a1e4e464e378f38aa3e9b56196bd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
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2023-05-19更新
|
1146次组卷
|
4卷引用:重庆市巴蜀中学校2022-2023学年高一下学期期中数学试题
重庆市巴蜀中学校2022-2023学年高一下学期期中数学试题湖北省宜昌市部分省级示范高中2023-2024学年高一下学期期中考试数学试题(已下线)模块四 专题2 小题进阶提升练(4)(北师大版)(已下线)第五篇 向量与几何 专题13 奔驰定理 微点1 奔驰定理(一)