1 . 已知
的面积为
,且
.
(1)求
;
(2)若点
为
边上一点,且
与
的面积之比为1:3.
①求证:
;
②求
内切圆的半径
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f42512944bb6478f06cdee50aa82ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eecc8c02ff3d06d7f31b313623da6c7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62f140d8587e6e35e01da1bbdefc53e.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba47906b1c55990f2c0ca31d656b774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba47906b1c55990f2c0ca31d656b774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
您最近一年使用:0次
2017-02-08更新
|
998次组卷
|
5卷引用:2017届江西抚州七校高三上期联考理数试卷
2 . 在
中,点
是边
上一点,且
.记
,
.
(1)求证:
;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d7176beed20a5b9b6af2df02dc1c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74491945847aa130dae78e6a8cb6f914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ea718698b44ab67a5dac6206e54f0d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4279fc3c5233e20f25f600d36f73a10.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c95fa7f61564978c8e26616bc14449e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841c4de47727d62aa60a33530bb6d958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc4844d3dd1b55de4c9f6c173845bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2017-05-22更新
|
581次组卷
|
6卷引用:2017届江西省红色七校高三上学期联考一数学(理)试卷
3 . 在
中,角
所对的边分别为
,已知
.
(1)求角
的大小;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.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/44c280def5bf4f34c64ccbc9e2167eb5.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe29c42302504e7fd8577dbc7d130ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f925603a7d4f82fb8e369ac9278c28.png)
您最近一年使用:0次
4 . 在
中,
的对边分别是
,
,且
.
(1)求证:
为等腰三角形;
(2)若
的面积为
,且
,求
边上的中线长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.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/89e98ef935fb49140d21e92bd18a43a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f090bf715903c758524fe791f479f2ba.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e609d7f5a3b904e30f43fbbc26033d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee75d1b742854ac7dd04caf3b6f91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
解题方法
5 . 如图,
为平面四边形
的四个内角.
;
(2)若
,
,
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65c20ae60d180a2e3a8ba1b3441701f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7b43b781ba5be772b2bf4d302c0a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f094001e6d2bc08c99192e0d3a39c9.png)
您最近一年使用:0次
2016-12-04更新
|
1095次组卷
|
5卷引用:2017届江西南昌市新课标高三一轮复习训练五数学试卷
2017届江西南昌市新课标高三一轮复习训练五数学试卷福建省2017年数学基地校高三毕业班总复习 三角函数 形成性测试卷(理科,A卷)(已下线)第10讲 拓展五:四边形问题 (讲)-2023年高考数学一轮复习讲练测(新教材新高考)江苏省常州市田家炳高级中学2023届高三一模热身练习数学试题(已下线)专题20 三角函数及解三角形解答题(理科)-2