如图,C为线段AE上一动点,(不与点A、E重合),在AE同侧分别作正
和正
,AD与BE交于点O,AD与BC交于点P,BE与CD交于点Q,连接PQ.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/183b4343-f25c-487e-a0ac-85c0f6f39147.png?resizew=186)
试说明:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/183b4343-f25c-487e-a0ac-85c0f6f39147.png?resizew=186)
试说明:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab857fe6da76bc86a646a30b25331197.png)
21-22七年级下·山东菏泽·期末 查看更多[2]
山东省菏泽市郓城县2021-2022学年七年级下学期期末数学试题(已下线)专题13.19 《轴对称》全章复习与巩固(基础篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(人教版)
更新时间:2022-08-17 19:47:31
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解答题-作图题
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【推荐1】如图,在边长为1的小正方形组成的网格中,
的顶点均为格点(网格线的交点).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/4e36122d-4810-4039-b6b0-0e50327c9739.png?resizew=194)
(1)
在格点上,且
与
不重合,若
与
全等,则图中的格点
共有______个;
(2)画出
的
边上的高
和
边上的中线
,并直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/4e36122d-4810-4039-b6b0-0e50327c9739.png?resizew=194)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解答题-证明题
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【推荐2】如图,四边形
中,
平分
,
,
为
的中点,
与
交于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)求证:
;
(2)求证:
;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f346517a459eddfb89b905b52f4a256b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/650016cc-21e8-422b-bd88-a75b5cc887a8.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b206da0e27e7901e834007736e078098.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d021981c03e75b1a246d899dcc64656.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065ea6d6e5be401dbbc0294241c085b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解题方法
【推荐3】问题情境:已知,在等边△ABC中,∠BAC与∠ACB的角平分线交于点O,点M、N分别在直线AC,AB上,且∠MON=60°,猜想CM、MN、AN三者之间的数量关系.
方法感悟:小芳的思考过程是在CM上取一点,构造全等三角形,从而解决问题;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/8da974e3-e770-493f-8f82-0f579e360cef.jpg?resizew=248)
小丽的思考过程是在AB取一点,构造全等三角形,从而解决问题;
问题解决:(1)如图1,M、N分别在边AC,AB上时,探索CM、MN、AN三者之间的数量关系,并证明;
(2)如图2,M在边AC上,点N在BA的延长线上时,请你在图2中补全图形,标出相应字母,探索CM、MN、AN三者之间的数量关系,并证明.
方法感悟:小芳的思考过程是在CM上取一点,构造全等三角形,从而解决问题;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/8da974e3-e770-493f-8f82-0f579e360cef.jpg?resizew=248)
小丽的思考过程是在AB取一点,构造全等三角形,从而解决问题;
问题解决:(1)如图1,M、N分别在边AC,AB上时,探索CM、MN、AN三者之间的数量关系,并证明;
(2)如图2,M在边AC上,点N在BA的延长线上时,请你在图2中补全图形,标出相应字母,探索CM、MN、AN三者之间的数量关系,并证明.
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解答题-作图题
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【推荐1】如图,在等边三角形ABC中.
![](https://img.xkw.com/dksih/QBM/2021/10/15/2830072768667648/2836815663742976/STEM/98b9d3c030f5434d816f383eae55596d.png?resizew=141)
(1)请用尺规作图画出三角形ABC的外接圆⊙O.(保留作图痕迹)
(2)若AB=3求⊙O的半径r.
![](https://img.xkw.com/dksih/QBM/2021/10/15/2830072768667648/2836815663742976/STEM/98b9d3c030f5434d816f383eae55596d.png?resizew=141)
(1)请用尺规作图画出三角形ABC的外接圆⊙O.(保留作图痕迹)
(2)若AB=3求⊙O的半径r.
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真题
【推荐2】如图,已知B、C、E三点在同一条直线上,△ABC与△DCE都是等边三角形.其中线段BD交AC于点G,线段AE交CD于点F.
![](https://img.xkw.com/dksih/QBM/2015/7/15/1573876126449664/1573876132175872/STEM/49a7675006864917ab1df146b71debb4.png)
求证:(1)△ACE≌△BCD;
(2)
.
![](https://img.xkw.com/dksih/QBM/2015/7/15/1573876126449664/1573876132175872/STEM/49a7675006864917ab1df146b71debb4.png)
求证:(1)△ACE≌△BCD;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8cde019391dc7918110c39dacb1f489.png)
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