如图,在
中,已知
为
的中线,过点A作
分别交
、
于点F、E,连接
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ade06068471a9d76e32b417bef7551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495be6a6b940e8affe38f2bcdee246b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd590b15905357c4f3dd7b201395e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
22-23七年级下·黑龙江哈尔滨·期中 查看更多[4]
黑龙江省哈尔滨市风华中学2022-2023学年七年级下学期期中数学试题 (已下线)作业02 认识三角形和多边形的内(外)角和-2023年【暑假分层作业】七年级数学(苏科版) 江苏省苏州市工业园区西安交通大学苏州附属初级中学2023-2024学年七年级下学期3月月考数学试题江苏省苏州市振华中学校2023-2024学年七年级下学期期中数学试题
更新时间:2023-05-03 09:33:22
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【知识点】 根据三角形中线求面积解读
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【推荐1】设
的面积为a,如图①将边
分别2等份,
、
相交于点O,
的面积记为
;如图②将边
分别3等份,
、
相交于点O,
的面积记为
;……,以此类推,若
,则a的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54dc0ff58e8c7d1035c2dff8572b30f.png)
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【推荐2】如图,点
为直线
外一动点,
,连接
、
,点
、
分别是
、
的中点,连接
、
交于点
,当四边形
的面积为
时,线段
的长度的最小值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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