1 . 已知
的面积为
,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
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名校
解题方法
2 . 剪纸又叫刻纸,是一种镂空艺术,是中华汉族最古老的民间艺术之一,如图,一圆形纸片沿直径AB对折,使圆上两点C、
重合,D,E为直径AB上两点,且
,对折后沿直线DC,EC级剪,展开得到四边形
,若
,则当四边形
的面积最小时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd41df221293d5cdbab35be6ae5987e.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a51c2b58fc7c931e7c63631e9a89cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293daa0ca733344347c5efaa75aab604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1fe7660ee42b8d3a9c076b700ae59a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293daa0ca733344347c5efaa75aab604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd41df221293d5cdbab35be6ae5987e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/30/11610188-a807-4ef2-b398-29ca84c2968a.png?resizew=525)
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2023-09-29更新
|
1621次组卷
|
6卷引用:第一讲:数形结合思想【练】
(已下线)第一讲:数形结合思想【练】(已下线)专题18 三角形中关于角的最值问题(已下线)第六章 平面向量及其应用(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)(已下线)压轴题07三角函数与正余弦定理压轴题9题型汇总-2湖北省武汉市华中师范大学第一附属中学2023届高三5月适应性考试数学试题江苏省南通市海安高级中学2023-2024学年高三上学期11月阶段检测数学试题
名校
解题方法
3 . 等边
的面积为
,且
的内心为
,若平面内的点
满足
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604d037b88148502a5608e0285c76f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b75f71a396f2910be554b1c71f51a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340f84b11637ee42eaeeec250d0f0c29.png)
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4 . 在
中,
,
,
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d6adfa8fb1352679c5185258d842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
5 . 已知正
的边长为1,中心为
,过
的动直线
与边
,
分别相交于点M、N,
,
,
.
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5dc34f1eb0f29b09e027a1f69479972.png)
________ .
(2)
与
的面积之比的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6bd78eaf4e6b4a904b9850392fcf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323f0075c96990706da0ba1d81c91ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18bf5477ab809cf5b133a045b0ea8e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e07c611d39260a3160ef7380df0fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5dc34f1eb0f29b09e027a1f69479972.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-09-12更新
|
649次组卷
|
3卷引用:黄金卷01
解题方法
6 .
的三个内角
,
,
所对的边分别为
,
,
,
,
,则
面积的最大值是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d7e2c43c8d5612f6bc2a248f42b659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2023高三·全国·专题练习
7 . 在
中,
,
,
,
为
内一点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7982a9bf6685a4bf29782635b819826.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9dbfc80b6ae9a2ddabb269b5924814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e2a96ad10f818c9a5ad7ef46a304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98f0db1041fa3f958e44c09a5483f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d91c77587f7c694947d757145efa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7982a9bf6685a4bf29782635b819826.png)
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解题方法
8 .
的内角A、B、C的对边分别为
,b,c,已知
,且
,则
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f695dd343b49038f32bb442d99ab3111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b5d6d3505564c2819d4b42804ffef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
9 . 如图,设
的内角
所对的边分别为
,
,且
,若
是
外一点,
,
,则当四边形
的面积最大时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e59387b95b56a4f676bc8dbf3dc24c.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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8c2e3575ce207b3817fdef24df86c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d81d0bc9531fb9340cdbd0ff55fb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b466f14067ec8653e2cbbb2684245b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e59387b95b56a4f676bc8dbf3dc24c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/84d296e8-93b8-47ad-b27d-944a832294b2.png?resizew=148)
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名校
10 . 在
中,内角A,B,C所对的边分别为a,b,c,
的面积为
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe7a93172d308a58200e3c722fe1072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd54e2ad5be7284dad74fc67450cb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
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2023-08-31更新
|
448次组卷
|
4卷引用:专题03 解三角形(分层练)