1 . 图①、图②均是
的正方形网格,每个小正方形的边长均为1,每个小正方形的顶点称为格点,点
均在格点上.在图①、图②中,只用无刻度的直尺,在给定的网格中按要求作图,所画图形的顶点均在格点上.
(1)在图①中,画等腰直角三角形
,使其面积为5;
(2)在图②中,画平行四边形
,使其面积为9.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954253b16a82489bb0e152543428c68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/97e6cc76-ffc9-49d6-b3d7-ee095169fa86.png?resizew=359)
(1)在图①中,画等腰直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)在图②中,画平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
您最近一年使用:0次
2023-07-28更新
|
94次组卷
|
3卷引用:2023年吉林省二模(格点作图题)
2 . 如图1,在
中,
,
,
.以
为边,在
外作等边
,D是
的中点,连接
并延长,交
于点E.
(1)直接写出边
的长为______;
(2)求证:四边形
是平行四边形;
(3)将图1中的四边形
折叠,折痕为
,F在
上,G在
上:
①如图2,若使点C与点A重合,求
的长;
②若使点C与
的一边中点重合,直接写出
的长是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa0bc9e11dc6fa1d678eee7ce0c5da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb49c1fd097c5aafc0c9080449f5fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/f5126205-d5d6-4c23-a622-238edcd91847.png?resizew=258)
(1)直接写出边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(3)将图1中的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
①如图2,若使点C与点A重合,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
②若使点C与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
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3 . 图①、图②、图③均是
的正方形网格,每个小正方形的边长均为1,其顶点称为格点,
的顶点均在格点上,只用无刻度的直尺,在给定的网格中,按下列要求作图,保留作图痕迹.
(1)在图①中确定一点D,使四边形
是平行四边形.
(2)在图②中,在边
上确定一点E,使
.
(3)在图③中确定一点F,使
与
关于
对称.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/7/3ccaa188-af57-4844-ae9e-c7c1604cf918.png?resizew=506)
(1)在图①中确定一点D,使四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
(2)在图②中,在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
(3)在图③中确定一点F,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-05-20更新
|
180次组卷
|
3卷引用:2023年吉林省二模(格点作图题)
4 . 如图,
是
的中线,点
是
上一点,过点
作
的平行线,过点
作
的平行线,两平行线交于点
,连接
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/a10d6927-c709-4c3d-8c56-7e4979ac1bfa.png?resizew=496)
【方法感知】如图①,当点
与点
重合时,易证:
.(不需证明)
【探究证明】如图②,当点
与点
不重合时,求证:四边形
是平行四边形.
小新同学受到【方法感知】中的启发,经过思考后延长
交
于点
.
请完成小新同学的证明过程.
【结论应用】如图③,当
,
时,
的延长线交
于点
,且点
为
中点.
(1)
= .
(2)当
时,
的长为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/a10d6927-c709-4c3d-8c56-7e4979ac1bfa.png?resizew=496)
【方法感知】如图①,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04006562d5654e3daa4be3422aa454e.png)
【探究证明】如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
小新同学受到【方法感知】中的启发,经过思考后延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
请完成小新同学的证明过程.
【结论应用】如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f12cacb8b66100d800356b2ba0b0df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca99b3593258bd2b6921a206757d582.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次
5 . 如图①、图②、图③均是
的正方形网格,每个小正方形的边长均为1,每个小正方形的顶点叫格点.
的顶点均在格点,点D为
上一格点,点E为
上任一点,只用无刻度的直尺,在给定的网格中,分别按下列要求画图,保留作图痕迹.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/8bbe67ed-e9a5-47d4-b1ab-dc2981ecda33.png?resizew=451)
(1)在图①中画
的中位线
,使点F在边
上.
(2)在图②中画以
为对角线的
.
(3)在图③中作射线
,在其上找到一点H,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/8bbe67ed-e9a5-47d4-b1ab-dc2981ecda33.png?resizew=451)
(1)在图①中画
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在图②中画以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6034f3823a306092d32d4273c45fdc24.png)
(3)在图③中作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9bc26abb83370469132b708f87123a.png)
您最近一年使用:0次
2023-04-15更新
|
322次组卷
|
4卷引用:2023年吉林省一模(格点作图题)
6 . 图①、图②均是
的正方形网格,每个小正方形的顶点称为格点.每个小正方形的边长均为
,点
、
均在格点上.在图①、图②给定的网格中按要求画图,所画图形的顶点均在格点上,不要求写出画法.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/0fd5cb0a-0f0f-421b-8940-ec5c6c91c6c6.png?resizew=230)
(1)在图①中,以线段
为腰画一个等腰直角
;
(2)在图②中,以线段
为边画一个四边形
,使其是中心对称图形,但不是轴对称图形,并且其中一个内角为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355bc0d6058a3dd1254ff395176ec55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/0fd5cb0a-0f0f-421b-8940-ec5c6c91c6c6.png?resizew=230)
(1)在图①中,以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)在图②中,以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
您最近一年使用:0次
2023-04-01更新
|
120次组卷
|
3卷引用:2023年吉林省一模(格点作图题)
7 . 已知:如图,在Rt△ABC中,D是AB边上任意一点,E是BC边中点,过点C作CF∥AB,交DE的延长线于点F,连接BF、CD.
(1)求证:四边形CDBF是平行四边形.
(2)当D点为AB的中点时,判断四边形CDBF的形状,并说明理由.
(1)求证:四边形CDBF是平行四边形.
(2)当D点为AB的中点时,判断四边形CDBF的形状,并说明理由.
![](https://img.xkw.com/dksih/QBM/2021/7/23/2770234794065920/2830777181757440/STEM/e45bc309baa5491cac13f6c1c273e577.png?resizew=254)
您最近一年使用:0次
2021-10-16更新
|
352次组卷
|
3卷引用:吉林省2021年中考数学真题变式汇编5
名校
8 . 在△ABC中,∠CAB=90°,AD是BC边上的中线,E是AD的中点,过点A作BC的平行线交BE的延长线于点F,连接CF.
(1)求证:四边形ADCF是菱形.
(2)连接CE,若CE=EF,直接写出长度等于
的线段.
(1)求证:四边形ADCF是菱形.
(2)连接CE,若CE=EF,直接写出长度等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097c8060b4a738805b3ee934ce878277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/a4222c46-01db-4cd0-8d0a-a2b545fe768b.jpg?resizew=370)
您最近一年使用:0次
2021-09-11更新
|
274次组卷
|
4卷引用:吉林省2021年中考数学真题变式汇编5
9 . 【教材呈现】如下是华师版八年级下册数学教材第121页的部分内容.
把一张矩形纸片如图1那样折一下,就可以裁出正方形纸片,为什么?
上述操作的理由是有一组 是正方形.
【问题拓展】如图2,已知平行四边形纸片ABCD(AD>AB),将平行四边形纸片沿过点A的直线折叠,使点B落在边AD上,点B的对应点为F,折痕为AE,点E在边BC上.
(1)求证:四边形ABEF是菱形.
(2)连结BF,若AE=6,BF=8,CE=2,则▱ABCD的面积为 .
把一张矩形纸片如图1那样折一下,就可以裁出正方形纸片,为什么?
上述操作的理由是有一组 是正方形.
【问题拓展】如图2,已知平行四边形纸片ABCD(AD>AB),将平行四边形纸片沿过点A的直线折叠,使点B落在边AD上,点B的对应点为F,折痕为AE,点E在边BC上.
(1)求证:四边形ABEF是菱形.
(2)连结BF,若AE=6,BF=8,CE=2,则▱ABCD的面积为 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/07070545-aabc-42fe-9d68-93bbdfee4bd5.png?resizew=360)
您最近一年使用:0次
2021-08-21更新
|
353次组卷
|
5卷引用:吉林省2021年中考数学真题变式汇编5
10 . 在
中,
,
,将
绕点
顺时针旋转一定的角度
得到
,点
、
的对应点分别是
、
.
![](https://img.xkw.com/dksih/QBM/2021/3/21/2682424896045056/2685458509070336/STEM/b4ec9249092348a88b2caa8294b5beb7.png?resizew=410)
![](https://img.xkw.com/dksih/QBM/2021/3/21/2682424896045056/2685458509070336/STEM/3c61b831102f47be890bdd529f535ce9.png?resizew=185)
(1)如图1,当点
恰好在
上时,求
的度数;
(2)如图2,若
时,点
是边
中点,求证:四边形
是平行四边形;
(3)若
,连结
、
,设
的面积为
,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2021/3/21/2682424896045056/2685458509070336/STEM/b4ec9249092348a88b2caa8294b5beb7.png?resizew=410)
![](https://img.xkw.com/dksih/QBM/2021/3/21/2682424896045056/2685458509070336/STEM/3c61b831102f47be890bdd529f535ce9.png?resizew=185)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
2021-03-25更新
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180次组卷
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3卷引用:2023年吉林省一模(几何探究题)