题目:如图①,在四边形ABCD中,AB=AD,∠ABC=∠ADC,那么BC=CD吗?请说明理由.
李由同学的解法如下:BC=CD
理由是:如图②,连结AC.在△ABC和△ADC中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5efee08c3a07e066d508be51db56e912.png)
∴△ABC≌△ADC
∴BC=CD.
(1)李由同学的解法 (填正确或错误),错误的原因是 .
(2)请正确解答这道题目.
李由同学的解法如下:BC=CD
理由是:如图②,连结AC.在△ABC和△ADC中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5efee08c3a07e066d508be51db56e912.png)
∴△ABC≌△ADC
∴BC=CD.
(1)李由同学的解法 (填正确或错误),错误的原因是 .
(2)请正确解答这道题目.
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755327069609984/2796471182589952/STEM/9e7298f1-fa11-4d5f-adcf-cad44f4cd155.png)
更新时间:2021-08-29 09:38:05
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解答题-作图题
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适中
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真题
【推荐1】如图,已知E是平行四边形ABCD的边AB上的点,连接DE.
(1)在∠ABC的内部,作射线BM交线段CD于点F,使∠CBF=∠ADE;(要求:用尺规作图,保留作图痕迹,不写作法和证明)
(2)在(1)的条件下,求证:△ADE≌△CBF.
(1)在∠ABC的内部,作射线BM交线段CD于点F,使∠CBF=∠ADE;(要求:用尺规作图,保留作图痕迹,不写作法和证明)
(2)在(1)的条件下,求证:△ADE≌△CBF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/4a549e7f-a651-4fca-b528-bee287940687.png?resizew=175)
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解答题-证明题
|
适中
(0.65)
【推荐2】在
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/edca23d4-7836-465b-bf02-6f0a8132d78d.png?resizew=342)
(1)如图1,在边
上取一点
,连接
,过点
作
交
的延长线于点
,求证:
.
(2)如图2,将一直角三角板的直角顶点与点
重合,另两边分别与
相交于点
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(1)如图1,在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b645bbac89a1298b582564d699eb813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec42f093ae13224f227269325dd2cc9.png)
(2)如图2,将一直角三角板的直角顶点与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐1】如图1,在平面直角坐标系中,
为等腰直角三角形,点
是斜边
的中点.
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(1)求点
坐标;
(2)如图2,若点
是线段
上一动点(不含端点
),以
为直角边作等腰直角三角形
其中
点
在第一象限.连接
,求
的度数;
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(3)如图3,将
向左平移
个单位长度,得到
已知点
与点F关于
轴对称.若点
为段
上一动点(不含端点
),以
为直角边作等腰直角三角形
,其中
.点
在第二象限,连接
,交
轴于点
.在点
运动的过程中,点
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(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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(3)如图3,将
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解答题-证明题
|
适中
(0.65)
【推荐2】如图1,四边形
是正方形,
,点E是边
上一点,连接
,作
的平分线交
于点F,连接
.
的长;
(2)当点E在
上运动时:
①当点F为边
的中点,求证:
;
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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(2)当点E在
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①当点F为边
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②求证:
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