解题方法
1 . 已知
中内角
的对边分别为
,向量
,
,
为锐角且
∥
,
.若
,则
的周长为_________ .
![](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/a1372103da0c90347b000fcc83f8081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15354b62bf0cfd91aaf39f161c06103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e83f77cd56f9781dd84b0fd388f106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2 . 已知
为△
的重心,过点
的直线与边
分别相交于点
.若
,则
与
的面积之比为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c6f95fb0f50d816861bc3a526aee76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab4cf09670861e61d67cbe70bb149a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26fe49d634f0746f38f16d88e03dc4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4bfa74832f9ad2afa8bad1135f67540.png)
您最近一年使用:0次
2019-01-04更新
|
1336次组卷
|
2卷引用:【市级联考】四川省成都市2019届高三第一次诊断性检测数学(文)试题
3 . 如图,在三角形
中,
、
分别是边
、
的中点,点
在直线
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38cef4e8b0cdcadf1f99f06aa6a26f9.png)
,则代数式
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.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/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38cef4e8b0cdcadf1f99f06aa6a26f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ebd31b81e2a640644008bbfe827113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541875b090df1429fded8c1d007023f2.png)
![](https://img.xkw.com/dksih/QBM/2018/3/28/1911761178984448/1912396312723456/STEM/9bf2fe1bfcb54057ba05ee50ac18015a.png?resizew=164)
您最近一年使用:0次