图①、图②、图③均是
的正方形网格,每个小正方形的边长为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,按下列要求画图,保留作图痕迹.
(1)在图①中
的边上确定一点
,连结
,使
;
(2)在图②中
的内部确定一点
,连结
,使
;
(3)在图③中
的外部确定一点
,连结
,使
.
![](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/2023/10/19/61530805-e87c-4c90-ae37-29fd1ae601a4.png?resizew=475)
(1)在图①中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb7c9b5376c6d491e743b710bc25701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5ba2608fa6b92245c84f1ad53817bd.png)
(2)在图②中
![](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/3c8ba4da3a6b049f010c91ccb4f328ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765ae22127122ab041ce5da24bc79f08.png)
(3)在图③中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb73ae3dc9f67bcf303e7c94a37080d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbeb7e634818742ac27d38a70b8b7e82.png)
更新时间:2023-10-10 10:36:49
|
相似题推荐
解答题-作图题
|
较难
(0.4)
【推荐1】如图,已知
,
,
是边
上一个定点,连接
.
(1)尺规作图:若
分别为边
上的动点,请你用圆规和无刻度的直尺在图1中作出
取得最小值时
所在位置;
(2)在(1)的条件下,若
,
,
,则
的最小值是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/f66fb730-0c3c-48fd-9f84-981c7256b8b8.png?resizew=418)
(1)尺规作图:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7db9aa0a1509ebcda52d5f7354d818c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79895b00d9d3d72995b8ee9aa54e98b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065f2c3527fcc9d84939c47ac8640643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79895b00d9d3d72995b8ee9aa54e98b4.png)
您最近一年使用:0次
【推荐2】【定义】
如图1,在Rt△ABC中,点M,N分别在直角边AC,BC上,若AM2+BN2=MN2,则称线段MN为Rt△ABC的“勾股线”.
【运用】
(1)如图1,MN为Rt△ABC的“勾股线”,AC=6,BC=4,AM=2,求CN的长;
(2)如图2,Rt△ABC中,∠C=90°,点P在边AC上,试用没有刻度的直尺和圆规作出Rt△ABC的一条“勾股线”PQ(要求:保留作图痕迹,不写作法);
(3)如图3,EF是Rt△ABC的“勾股线”,BF=
AE,CF=
AE,D是斜边AB上一点,且AD=
BD,连接DF.求tan∠DFE的值.
如图1,在Rt△ABC中,点M,N分别在直角边AC,BC上,若AM2+BN2=MN2,则称线段MN为Rt△ABC的“勾股线”.
【运用】
(1)如图1,MN为Rt△ABC的“勾股线”,AC=6,BC=4,AM=2,求CN的长;
(2)如图2,Rt△ABC中,∠C=90°,点P在边AC上,试用没有刻度的直尺和圆规作出Rt△ABC的一条“勾股线”PQ(要求:保留作图痕迹,不写作法);
(3)如图3,EF是Rt△ABC的“勾股线”,BF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546733530595328/2547328122560512/STEM/9a84761f-3205-4400-a7c9-bb7a7c9f11c2.png?resizew=533)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】在
中,点D,E分别为
,
上的动点.
(1)如图1,连接
,点F在
上,若
,求证:
;
(2)在(1)的条件下,若
,
,求证:
;
(3)如图2,
,
,已知
,则当
的值最小时,
与
之间的数量关系为__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/e6702afa-30ee-4dc7-b4d8-87799556bc4b.jpg?resizew=346)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5604ff5095cb14e90013d714a5c1fbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3819d053665e51d6c8eeb21cda1da59.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab0389bef7fea9fd2429966ef6bf2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8bfe298fb2948547723517cd2ec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792be21903ea28da3cb98c65a952d41b.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa80cfd38f59e5cbbb30628d03113689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24de889b36de076a95076a05f21fa5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在
中,
,过点A作
于点D,E为
边上一点,且
,过点E作
于点F.
(1)求证:
;
(2)连接
,若G为线段
的中点,连接
.
(i)试判断
的形状,并说明理由;
(ii)连接
,记
的面积分别为
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/087f6873-5d3f-4955-a643-5d8514f4cee4.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc288dd6d25d2eb811b44b46938ae0f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976f1df662c0d5f5d977455244547002.png)
(i)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029ad83f1a3262048cba0e650b63e929.png)
(ii)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e161eb78a9484626baeaa1becaf77d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b982b4ed3b75609bda6af3914986d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0076cade30e34afb2e71b370c16480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】(1)【问题情境】如图
,四边形
是正方形,点
是
边上的一个动点,以
为边在
的右侧作正方形
,连接
、
,则
与
的数量关系是______;
,四边形
是矩形,
,
,点
是
边上的一个动点,以
为边在
的右侧作矩形
,且
,连接
、
.判断线段
与
有怎样的数量关系和位置关系,并说明理由;
(3)【拓展提升】如图3,在(2)的条件下,连接
,则
的最小值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13458f8259fd95e92dad787e91571a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)【拓展提升】如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adabb437c815f64297bf0bbd184f9027.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在△ABC中,点D在直线AB上,在直线BC上取一点E,连接AE,DE,使得 AE=DE,DE交AC于点G,过点D作DF∥AC,交直线BC于点F,∠EAC=∠DEF.
![](https://img.xkw.com/dksih/QBM/2015/9/28/1573917667516416/1573917673480192/STEM/cd9a352a7ce54ba9b4d05e24957998bc.png)
(1)当点E在BC的延长线上,D为AB的中点时,如图1所示.
①求证:∠EGC=∠AEC;
②若DF=3,求BE的长度;
(2)当点E在BC上,点D在AB的延长线上时,如图2所示,若CE=10,5EG=2DE,求AG的长度.
![](https://img.xkw.com/dksih/QBM/2015/9/28/1573917667516416/1573917673480192/STEM/cd9a352a7ce54ba9b4d05e24957998bc.png)
(1)当点E在BC的延长线上,D为AB的中点时,如图1所示.
①求证:∠EGC=∠AEC;
②若DF=3,求BE的长度;
(2)当点E在BC上,点D在AB的延长线上时,如图2所示,若CE=10,5EG=2DE,求AG的长度.
您最近一年使用:0次