如图,点
、
、
都在
上,
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502176f88530d7ae07567ccbc67cc5e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481fd8d318cf0608d9f739b6ef754481.png)
更新时间:2024-04-11 10:13:54
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解答题-问答题
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【推荐1】如图,两根长度为12米的绳子,一端系在旗杆上的同一位置A点,另一端分别固定在地面上的两个木桩B,C上(绳结处的误差忽略不计),现在只有一把卷尺,如何检验旗杆是否垂直于地面BC?请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/9/20/2294777871826944/2295049814261760/STEM/91c1b75f256345cdb031d37ca4cbaab2.png?resizew=116)
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解答题-作图题
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【推荐2】如图,已知Rt△ABC中,
,经过点A的直线l与BC交于点F.
(1)请作出△ABC关于直线l轴对称的△ADE(
的对应点分别是A、D、E)
(2)连接CD,EB,在不添加其它辅助线的情况下,请你找出图中的一对全等三角形: ≌ ;
(3)证明(2)中的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
(1)请作出△ABC关于直线l轴对称的△ADE(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd40d480b4b0a70f4e0dc10f601beff.png)
(2)连接CD,EB,在不添加其它辅助线的情况下,请你找出图中的一对全等三角形: ≌ ;
(3)证明(2)中的结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/705b94fd-174a-4177-9094-27772170610a.png?resizew=137)
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解答题-问答题
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【推荐1】如图所示,
、
是
的切线,
、
为切点,
,点
是
上不同于
、
的任意一点,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0deaba089f49bb958b4b05064cf29694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
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解答题-作图题
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【推荐2】如图,
是半圆
的直径,点
在半圆外,
与半圆交于
点和E点.
(1)利用现有已知条件请只用无刻度的直尺作出
的两条高线,不必写出作法;
(2)若
,连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/0340fbb4-96e9-4e6b-a7cd-16bd9a1f0bdc.png?resizew=153)
(1)利用现有已知条件请只用无刻度的直尺作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d384390f4e0a1e0abd4cc19382d94db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5273440d800b96bfcaaa9970cc45.png)
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