如图①,在
中,
,
,
边上的高为4,点E是边
上一动点.
,使点F,G在边
上.(不写做法,保留作图痕迹)
(2)聪明的你一定会发现,可作出的菱形的个数随着点E的位置变化而变化.请直接写出菱形的个数及对应的
的长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df049f15adb6667113ceee3a6638cd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)聪明的你一定会发现,可作出的菱形的个数随着点E的位置变化而变化.请直接写出菱形的个数及对应的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
更新时间:2024-05-24 07:06:26
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】按要求画图,并回答问题:
如图,同一平面上有四点A,B,C,D.
(1)画出直线AB,射线DC;
(2)延长线段DA至点E,使AE =AD;
(3)画一点P,使点P既在直线AB上,又在线段CE上;
(4)用量角器量得∠AEP的大小约为___________°.(精确到度)
如图,同一平面上有四点A,B,C,D.
(1)画出直线AB,射线DC;
(2)延长线段DA至点E,使AE =AD;
(3)画一点P,使点P既在直线AB上,又在线段CE上;
(4)用量角器量得∠AEP的大小约为___________°.(精确到度)
![](https://img.xkw.com/dksih/QBM/2019/1/23/2124746240909312/2127134964752384/STEM/4ea1e8a700b1421893e45ba1e2cbaaea.png?resizew=159)
您最近一年使用:0次
解答题-作图题
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适中
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【推荐2】已知:如图1,线段a,b(
).
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893464109498368/2895882938490880/STEM/a8a23e33-ffb6-4c53-9e6a-c52bf4aacac3.png?resizew=325)
(1)求作:等腰
ABC,使得它的底边长为b,底边上的高的长为a.
作法:①作线段
.
②作线段AB的垂直平分线MN,与AB相交于点D.
③在MN上取一点C,使
.
④连接AC,BC,则
ABC就是所求作的等腰三角形.
用直尺和圆规在图2中补全图形(要求:保留作图痕迹);
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893464109498368/2895882938490880/STEM/7aefcf07-e6ff-43c7-81a4-fef17b2f1bdf.png?resizew=156)
(2)求作:等腰
PEF,使得它的腰长为线段a,b中一条线段的长,底边上的高的长为线段a,b中另一条线段的长.
作法:①作直线l,在直线l上取一点G.
②过点G作直线l的垂线GH.
③在GH上取一点P,使PG= .
④以P为圆心,以 的长为半径画弧,与直线l分别相交于点E,F.
⑤连接PE,PF,则
PEF就是所求作的等腰三角形.
请补全作法,并用直尺和圆规在图3中补全图形(要求:保留作图痕迹).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893464109498368/2895882938490880/STEM/a8a23e33-ffb6-4c53-9e6a-c52bf4aacac3.png?resizew=325)
(1)求作:等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
作法:①作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aada537209e8ab7626e42b17f68907b1.png)
②作线段AB的垂直平分线MN,与AB相交于点D.
③在MN上取一点C,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede69346d90f2c2c7d738d90c6aa60a8.png)
④连接AC,BC,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
用直尺和圆规在图2中补全图形(要求:保留作图痕迹);
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893464109498368/2895882938490880/STEM/7aefcf07-e6ff-43c7-81a4-fef17b2f1bdf.png?resizew=156)
(2)求作:等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
作法:①作直线l,在直线l上取一点G.
②过点G作直线l的垂线GH.
③在GH上取一点P,使PG= .
④以P为圆心,以 的长为半径画弧,与直线l分别相交于点E,F.
⑤连接PE,PF,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
请补全作法,并用直尺和圆规在图3中补全图形(要求:保留作图痕迹).
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893464109498368/2895882938490880/STEM/d9166088-3242-4cdf-bc9b-f75e0288b8fe.png?resizew=282)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的外接圆,
平分
的外角
,
,
,垂足分别是点M、N,且
.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983487078899712/2989080359419904/STEM/76a9034e-22e8-424e-9f8a-df63f29b8802.png?resizew=242)
(1)求证:
//
;
(2)如图,延长
交
于E点,若
,
;求
的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd6ec8fa1147280a0eaba74744b2d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9ebf55cadec703db791e748c72ee03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2032fccdf9ab12429aae024d67b19d60.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983487078899712/2989080359419904/STEM/76a9034e-22e8-424e-9f8a-df63f29b8802.png?resizew=242)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091611d8f6eef3aa176c8959de7132e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd9b2c3ed9d0202cbb86d33a183e6ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】(1)如图1,在平面直角坐标系中,过格点A,
,
作一圆弧,圆弧所在圆的圆心
的坐标为
(2)如图2所示,破残的圆形轮片上,弦
的垂直平分线交弧
于点
,交弦
于点
.已知:
,
.求破残的圆形轮片圆的半径.
![](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/dad2a36927223bd70f426ba06aea4b45.png)
(2)如图2所示,破残的圆形轮片上,弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3433f3d99b827bb05e87d92faaf89f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8610ba53f34de2459b4644b0296532.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/47266ce4-fd77-44df-aa99-88be110d8c1b.png?resizew=365)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在Rt△ABC中,∠ACB=90°,点D、E分别是边AB、AC的中点,延长DE至F,使得AF∥CD,连接BF、CF.
(1)求证:四边形AFCD是菱形;
(2)当AC=4,BC=3时,求BF的长.
(1)求证:四边形AFCD是菱形;
(2)当AC=4,BC=3时,求BF的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/643945dc-fda5-4749-994b-8dd82e17ab3d.png?resizew=162)
您最近一年使用:0次
解答题-证明题
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真题
名校
【推荐2】如图,在△ABC中,∠ACB=
,D,E分别为AC,AB的中点,BF∥CE交DE的延长线于点F.
(1)求证:四边形ECBF是平行四边形;
(2)当∠A=
时,求证:四边形ECBF是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
(1)求证:四边形ECBF是平行四边形;
(2)当∠A=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1574248671952896/1574248677892096/STEM/4341ec01-8024-440b-b654-29c7ce66b518.png?resizew=129)
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解答题-作图题
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适中
(0.65)
【推荐1】如图,已知直线l及点A、B,求作
,使得
经过点A、B,且圆心O在直线l上
保留作图痕迹,不写作法![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce8411079aca57f17d3ead32798f055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/2018/8/21/2015378294235136/2017586736168960/STEM/69f78df1fa91437e81b429180110203f.png?resizew=147)
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解答题-作图题
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适中
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【推荐2】如图所示,△ABC的顶点均在格点上,点C的坐标为(4,﹣1).
①将△ABC以绕原点O顺时针方向旋转90°得到对应的△A1B1C1,请画出△A1B1C1,并写出点B1的坐标;
②作出△ABC的外接圆,并计算△ABC的外接圆的面积.(要求:尺规作图,保留作图痕迹,不写作法)
①将△ABC以绕原点O顺时针方向旋转90°得到对应的△A1B1C1,请画出△A1B1C1,并写出点B1的坐标;
②作出△ABC的外接圆,并计算△ABC的外接圆的面积.(要求:尺规作图,保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/2022/1/1/2884881836515328/2887317558460416/STEM/84dc7ee1-0f42-44b1-8a3a-a718ad62c5d6.png?resizew=409)
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