如图①,有结论:
,因为这个图形像飞镖,所以我们往往把这个模型称为“飞镖模型”,如图②,在飞镖模型中分别作
和
的平分线交于点
,易得
,如图③,在飞镖模型中作
靠
的三等分线,作
靠
的三等分线,两条三等分线交于点
,……,依次方法,在飞镖模型中作
靠
的n等分线,作
靠
的n等分线,两条n等分线交于一点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b2b735d1f07649f8ce9852a0814ed6.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd41aaea473868b341b0ad7ae74314d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476cab68a460bd69135dc71f50afbc7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46eb50e837a319436fb01a865d666c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b2b735d1f07649f8ce9852a0814ed6.png)
更新时间:2024-05-23 07:51:53
|
【知识点】 与角平分线有关的三角形内角和问题解读
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【推荐1】如图,在
中,
,
,三角形的外角
和
的平分线交于点E,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c44345de7d1f37b48def25db8c5e2b.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456e0f77d83975fdbdb60b499cb5b521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c44345de7d1f37b48def25db8c5e2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/a26f06c6-f28d-4649-96f0-fb99e9e71c50.png?resizew=206)
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【推荐2】如图,BD、CE是△ABC的角平分线,它们相交于点O,若∠A=64°,则∠BOC=_____ .
![](https://img.xkw.com/dksih/QBM/2020/6/28/2494153603055616/2494679518380032/STEM/cfd4fbfa7d8f48e4ace6f104f87ec518.png?resizew=108)
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