同学们在做题时,经常用到“在直角三角形中,
角所对的直角边等于斜边的一半”这个定理,下面是两种添加辅助线的证明方法,请你选择一种进行证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/38c16957-bc4d-4abd-a4ce-0bddbd3d3765.png?resizew=102)
已知在
中,
,求证:
.
法一:如图1,在
上取一点
,使得
,接
.
法二:如图2,延长
到
,使得
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5648c980-e8b3-4480-8063-a9f692c24315.png?resizew=310)
图1 图2
你选择方法_______
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/38c16957-bc4d-4abd-a4ce-0bddbd3d3765.png?resizew=102)
已知在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b4e453406dad357caf3faea5cbae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe44ff9f829f6c034682572ad00e366.png)
法一:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
法二:如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5648c980-e8b3-4480-8063-a9f692c24315.png?resizew=310)
图1 图2
你选择方法_______
证明:
2023·北京·一模 查看更多[8]
2023年北京二中教育集团中考一模数学试卷(已下线)第11讲 等边三角形的性质与判定定理-【暑假自学课】2023年新八年级数学暑假精品课(浙教版)(已下线)专题13 三角形及全等三角形(共35题)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(北京专用)河南省许昌市禹州市2023-2024学年八年级上学期期中数学试题(已下线)浙江省金华市婺城区2023-2024学年九年级上学期期末数学试题北京景山学校2023-2024学年九年级下学期开学考试数学试题(已下线)专题06+全等三角形和特殊三角形(4大易错点分析)2-备战2024年中考数学考试易错题(浙江专用)北京市回民学校2023-2024学年九年级下学期月考数学试题
更新时间:2024-03-03 20:49:16
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真题
【推荐1】如图,在
中,
,作
的垂直平分线交
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至点E,使
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
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(2)若
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解答题-作图题
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较易
(0.85)
【推荐2】已知:
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/82395231-8ff0-46cc-91d0-f93cee863a25.png?resizew=153)
(1)作
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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(2)在
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解答题-问答题
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较易
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【推荐1】如图,在
中,
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![](https://img.xkw.com/dksih/QBM/2022/11/29/3120251380260864/3127073932648448/STEM/7ba829a762c0456887b899b6d1210833.png?resizew=201)
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之间有什么数量关系?请说明理由.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6298de3a9c3ecd405fcc9971ddb02467.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
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【推荐2】如图,在
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