已知:如图,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/a06b1286-0d26-4e7b-9597-3cea1fe03fd2.png?resizew=132)
(1)请用直尺和圆规,按以下要求作图(保留作图痕迹).
作法:
①作
平分
交
于点
;
②作线段
的垂直平分线分别交
于点
,交
于点
;
③连接
;
(2)在(1)所作的图中,试判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/a06b1286-0d26-4e7b-9597-3cea1fe03fd2.png?resizew=132)
(1)请用直尺和圆规,按以下要求作图(保留作图痕迹).
作法:
①作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
②作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/a0ed1ec316bc54c37c4286c208f55667.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c818110255bdad691f61be6461a6fd73.png)
(2)在(1)所作的图中,试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
更新时间:2021-04-12 09:00:46
|
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解答题-作图题
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适中
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【推荐1】作图题
(1)(尺规作图,保留作图痕迹,不写作法).在图中找出点
,使得点
到
两点的距离相等,并且点
到边
的距离也相等.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/45d36112-e561-4d60-8ba0-b1a0ee2f3f48.png?resizew=279)
(2)如图,在平面直角坐标系中,画出
关于y轴对称的
,并直接写出点
的坐标.
(1)(尺规作图,保留作图痕迹,不写作法).在图中找出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a9818bf0468eb2db6646d80836ca09.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/45d36112-e561-4d60-8ba0-b1a0ee2f3f48.png?resizew=279)
(2)如图,在平面直角坐标系中,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/165c86d8-0b6f-4f11-a339-90f99394c8d8.png?resizew=360)
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解答题-作图题
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适中
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名校
【推荐2】如图,AB
CD,点E是CD的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986509202432000/3015262470201344/STEM/c0fe934f2ad845e9ad66db355eac2441.png?resizew=252)
(1)用尺规作∠BDC的平分线(不写作法,保留作图痕迹)
(2)在(1)的情形下,设∠BDC的平分线交AB于点F,连接EF交DC于点H.若HB=HC,猜想四边形BDEF是哪种特殊的平行四边形?完成下列证明.
∵点E是CD的中点,
∴CE=DE,
∵CH=BH,
∴ ①
∵AB
CD,
∴四边形BDEF是平行四边形,
∵AB
CD,
∴ ②=∠EDF,
∵BF平分∠DDC,
∴ ③=∠EDF,
∴ ④=∠BDF,
∴BF=BD,
∴四边形BDEF是 ⑤.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986509202432000/3015262470201344/STEM/c0fe934f2ad845e9ad66db355eac2441.png?resizew=252)
(1)用尺规作∠BDC的平分线(不写作法,保留作图痕迹)
(2)在(1)的情形下,设∠BDC的平分线交AB于点F,连接EF交DC于点H.若HB=HC,猜想四边形BDEF是哪种特殊的平行四边形?完成下列证明.
∵点E是CD的中点,
∴CE=DE,
∵CH=BH,
∴ ①
∵AB
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
∴四边形BDEF是平行四边形,
∵AB
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
∴ ②=∠EDF,
∵BF平分∠DDC,
∴ ③=∠EDF,
∴ ④=∠BDF,
∴BF=BD,
∴四边形BDEF是 ⑤.
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解答题-证明题
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适中
(0.65)
【推荐1】如图,A是∠MON边OM上一点,AE∥ON.
![](https://img.xkw.com/dksih/QBM/2020/5/13/2462088039677952/2462485016444928/STEM/759112996d4b493bbb6361a4bf76b3ae.png?resizew=222)
(1)在图中作∠MON的角平分线OB(要求用尺规),交AE于点B;过点A画OB的垂线,垂足为点D,交ON于点C,连接CB,将图形补充完整.
(2)判断四边形OABC的形状,并证明你的结论.
解:四边形OABC是 .
![](https://img.xkw.com/dksih/QBM/2020/5/13/2462088039677952/2462485016444928/STEM/759112996d4b493bbb6361a4bf76b3ae.png?resizew=222)
(1)在图中作∠MON的角平分线OB(要求用尺规),交AE于点B;过点A画OB的垂线,垂足为点D,交ON于点C,连接CB,将图形补充完整.
(2)判断四边形OABC的形状,并证明你的结论.
解:四边形OABC是 .
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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,在边长为1的正方形组成的网格中建立直角坐标系,
的顶点均在格点上,点
为原点,点
,
的坐标分别是
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/1422cceb-8044-498c-bda6-c8f7c4a41bf0.png?resizew=305)
(1)将
绕点
逆时针旋转
后得到
,请在图(1)中画出
,并求出这时点
的坐标为______;
(2)如图(2)所示,在
中,作出
边上的高
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/1422cceb-8044-498c-bda6-c8f7c4a41bf0.png?resizew=305)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
(2)如图(2)所示,在
![](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/03902478df1a55bc99703210bccab910.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,矩形
的对角线
交于点
,且
.
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455682429362176/2456663887085568/STEM/16fb59f74d624a119f0bf1e6014426f9.png?resizew=141)
(1)求证:四边形
是菱形;
(2)若
,求菱形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
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(1)求证:四边形
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(2)若
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解答题-证明题
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【推荐2】如图,AE∥BF,AC平分∠BAE,交BF于点C,BD平分∠ABC,交AE于点D,连接CD.
(1)求证:四边形ABCD是菱形;
(2)若AB=5,AC=6,求AE,BF之间的距离.
(1)求证:四边形ABCD是菱形;
(2)若AB=5,AC=6,求AE,BF之间的距离.
![](https://img.xkw.com/dksih/QBM/2016/9/13/1574238242799616/1574238249132032/STEM/04cc6bad6b7c46ea88be1821a9a15a89.png?resizew=206)
您最近一年使用:0次