如图,已知
为等腰三角形,
,
为线段
延长线上一点,连接
,
平分
交
于点
、
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/fa9a6de2-0120-47c1-b397-561f22f42638.png?resizew=136)
(1)猜想
与
的数量关系,并证明;
(2)求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86cae7cc6665dc8edfb9060075b3afb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a2d3961a75cc2a83ab533dea0ff00a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/fa9a6de2-0120-47c1-b397-561f22f42638.png?resizew=136)
(1)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf6be1a889c43ae8afc8a5f223aa003.png)
22-23八年级上·辽宁大连·期末 查看更多[8]
辽宁省大连市庄河市2022-2023学年八年级上学期期末数学试题(已下线)专题09 全等三角形证明方法:截长补短【考点串讲+热点题型专训】-2022-2023学年七年级数学下学期期中期末考点大串讲(北师大版)(已下线)专题13.3 等腰三角形的性质与判定【十大题型】-2023-2024学年八年级数学上册举一反三系列(华东师大版)(已下线)专题13.2 等腰三角形的性质与判定【十大题型】-2023-2024学年八年级数学上册举一反三系列(人教版)(已下线)专题2.2 等腰三角形的性质与判定【十大题型】-2023-2024学年八年级数学上册举一反三系列(苏科版)(已下线)专题2.2 等腰三角形的性质与判定【十大题型】-2023-2024学年八年级数学上册举一反三系列(浙教版) 重庆市育才中学2023-2024学年八年级上学期数学定时训练二(已下线)专题15.2 等腰三角形的性质与判定【十大题型】-2023-2024学年八年级数学上册举一反三系列(沪科版)
更新时间:2023-03-16 10:19:43
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【推荐2】如图,△ABC中,∠ABC=30°,∠ACB=50°,DE、FG分别为AB、AC的垂直平分线,E、G分别为垂足.
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【推荐1】如图,在等腰三角形
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【推荐2】已知:在菱形
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,
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(2)如图2,连接
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(2)如图2,连接
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适中
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名校
【推荐1】已知四边形
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与
交于点G.
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是矩形,且
,求证:
;
类比探究:
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是平行四边形,且
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137717f0e360e82319ced7e3a6c69b2e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
特例解析:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/3fc1af0e-5263-461d-9e26-15413a263da4.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/64ebeafb-c423-488d-9168-6d7136121339.png?resizew=180)
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类比探究:
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适中
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【推荐2】如图所示,在
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(1)求证:
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(2)如果
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