题型:解答题
难度:0.65
引用次数:596
题号:17436559
(1)【问题背景】如图1:在四边形
中,
,
,
,E、F分别是
上的点,且
,试探究图中线段
之间的数量关系.
小王同学探究此问题的方法是:延长
到点G,使
,连接
,先证明
,再证明
,可得出结论,他的结论应是 .
(2)【探索延伸】如图2,若在四边形
中,
,E、F分别是
上的点,且
,上述结论是否仍然成立,并说明理由.
(3)【学以致用】如图3,四边形
是边长为5的正方形,
,直接写出
的周长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1c9b38caa3555de48cfbbbc08f72d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950ee05ebff17df10b49e679ac9bf4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d853c6adcf82556e8c2b9c8c5c05af0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030c278b9b5337b36c0db5c2feb014f7.png)
小王同学探究此问题的方法是:延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc180eda08edfb6d54eb04da7741f099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9447186e671b430b1f2186c8a48824b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62dff250a2c53e9fa38975355cb81eb.png)
(2)【探索延伸】如图2,若在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151570ad3c0d131e1b7054e01bf1f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dbf16d3adcc74fbea454665bc66ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6aef04eceb608a7a2cfc3e566f9e8b.png)
(3)【学以致用】如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7a2ac664f90a359102f9c4ceb88009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/18143ee8-38c6-47fe-bf15-8f74004f86ba.png?resizew=381)
更新时间:2022-11-27 16:53:37
|
【知识点】 全等的性质和SAS综合(SAS)解读
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解答题-证明题
|
适中
(0.65)
【推荐1】在平面直角坐标系中,点
的坐标为
.
(1)如图1,若点
在
轴正半轴上,点
,
,
,则点
坐标为______
(2)如图2,若点
在
轴负半轴上,
轴于点
,
轴于点
,
,
交直线
于点
,若点
,
,求点
坐标.
(3)如图3,若点
,
分别在
,
轴的正半轴上,
,连接
,点
、
是
边上的两点,设
,
,则以线段
、
、
长度为边长的三角形的形状为______(①钝角三角形;②直角三角形;③锐角三角形;④随线段的长度而定),请选择,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d76e8409eaeb0b89c52d153b94644c.png)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb7cedd527033f8b87f7ea4e5460a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/2/95ab7a33-0638-47c9-ac75-a53048438997.png?resizew=169)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e6dc08b0ba0a0bf43d9395da447b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f425c7db35f8f3b7cac4b534afe2d4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08daee1b84dcc40c56bb31922fd88bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76da640bd19d2c87ad041fd44666de8.png)
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(3)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f0a738c3ad8856e2cd6061f862fc7a.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/2/97b58463-ab70-4b6d-8f47-9052e2a675a6.png?resizew=169)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图1,在
中,
,作
的垂直平分线
,交
于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/777f8439-1eb9-4c78-980b-442176d41241.png?resizew=318)
(1)当
时,直接写出线段
与
的大小关系:
______
.(填“
”、“
”或“
”)
(2)若
为任意锐角,则线段
与
的大小关系是
(填“
”、“
”或“
”),请说明理由;由此得出结论:直角三角形一条直角边的垂直平分线交斜边于一点,这点到三个顶点之间的距离 ;
(3)如图2,
是
的边
上的一个动点,
于点
,
于点
,
与
交于点
.当点
运动到某处时,
与
正好垂直,此时
平分
吗?请说明理由.
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/777f8439-1eb9-4c78-980b-442176d41241.png?resizew=318)
(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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(3)如图2,
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