如图,在
中,D,E,F分别在边BC,AB,AC上,且
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a94970db014a77918abf06765f2768a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe610e6a02b86511f8be5de37d92b0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a94970db014a77918abf06765f2768a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/c1a4c334-ec0f-455a-9619-f984a6618230.png?resizew=156)
21-22高一下·江西南昌·期末 查看更多[2]
更新时间:2022-07-02 10:45:06
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填空题-单空题
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适中
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名校
【推荐1】如图所示,点
是圆
上的三点,线段
与线段
交于圆内一点
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73ba7fd5c3f0fbfb7325dbc1e1c1879.png)
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解题方法
【推荐2】在
中,
,
,
,
为
的重心,
在边
上,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5b82773275510e3ed4ed7bce8b0ca5.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46a4e894ae759de1877c4d24cd135fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6b76b84f59139b6b11f010498b2bbc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
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解题方法
【推荐1】如图,在平行四边形
中,点
为边
的中点,
与
交于点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b62a6a6167b2832999c152ed5b96ef.png)
_________ ;若点
是
内部(包括边界)一动点,且
,则
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4afa0b0810a4fd37b764a0795c1fe8a.png)
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【推荐1】已知圆
的圆心为点
,直线
与圆
交于
两点,点
在圆
上,且
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb53a5e73f95e3f46a34965c5c0ac73.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8785046420bdd426bbd7a26041ff214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】已知
是圆
:
的直径,
为坐标原点,直线
:
与
轴垂直,过圆
上任意一点
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)作直线
与
分别交直线
于
两点, 则
的值为______ .
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