1 . 如图,已知
,
,
为射线
上两点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/8a48afa2-d925-45d4-ab86-2ebd89ec973d.png?resizew=180)
(1)求作菱形
,使得点
在射线
上(尺规作图,保留作图痕迹,不写作法);
(2)连接
,
交于点
,
交
于
在(1)的条件下,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcba110804ba8bcfdc4a613b3703498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075bc6df108c9c2b3b5ac46bca7c8d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d770538fd05ed8bb8a7d17df10e9e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/8a48afa2-d925-45d4-ab86-2ebd89ec973d.png?resizew=180)
(1)求作菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedae548cfe15a9a7f49eaeaafd161bf.png)
您最近一年使用:0次
名校
2 . 下面是某数学兴趣小组用尺规作图“作一条线段的三等分点”的过程,请认真阅读并完成相应的任务.
如图1:①分别以点A,B为圆心,大于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
的长为半径在
两侧画弧,四段弧分别交于点C,点D;
②连接
,作射线
;
③以D为圆心,
的长为半径画弧,交射线
于点E;
④连接
,交
于点F,点F即为
的三等分点(即
).
任务:
(1)求证:四边形
是菱形;
(2)请你证明点F为
的三等分点;
(3)尺规作图:如图2,请利用尺规再设计一种方法,作线段
的三等分点.(保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/f945573f-d1d3-4a78-9968-a8dcc9763f0e.png?resizew=283)
如图1:①分别以点A,B为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f8dbba1bf3fc438aee6347beed6172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
③以D为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
④连接
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e77686cf448ff6cea9bfc021581da83.png)
任务:
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
(2)请你证明点F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)尺规作图:如图2,请利用尺规再设计一种方法,作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-11-19更新
|
56次组卷
|
2卷引用:福建省宁德市福鼎市第一中学2023-2024学年九年级上学期期中数学试题
3 . 如图,在
中,
.
(1)求作菱形
,使得D,E,F分别在边
上;(要求:尺规作图,不写作法,保留作图痕迹)
(2)在(1)的条件下,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/18e06b6b-5f92-4fce-b090-e15d83c8aebe.png?resizew=149)
(1)求作菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839ce94689e556c5d3bbad67071a64de.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc89e71a488b4a0fb467f7ab24d7a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73538c09794f3223540bfe074edff82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
名校
4 . 如图,在
中,
,
.
(1)求作:
的平分线
交
于点D;(要求:尺规作图,保留作图痕迹,不写作法)
(2)求证:点D为线段
的黄金分割点(即
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/7cf0da95-be68-418c-b712-b39ef3e7b25b.png?resizew=91)
(1)求作:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求证:点D为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bea4ef7a823237d84e4bae51458cef8.png)
您最近一年使用:0次
5 . 如图,在
中,
.
(1)利用尺规作图,过点A作一条直线
,使其交
于点D,且使
(不写作法,保留作图痕迹);
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a4d634d3d678a1912a827fade6a0d2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/3a0c70f2-205a-46e1-9456-0464a22dbabf.png?resizew=120)
(1)利用尺规作图,过点A作一条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c815d194b50c889b5638b05f705a6cec.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7ba4f387eef9a8f72002135232e3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2023-11-25更新
|
26次组卷
|
2卷引用:辽宁省大连市高新技术产业园区2023-2024学年九年级上学期期中数学试题
名校
6 . 如图,在直角
内,以A为一个顶点作正方形
,使得点E落在
边上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/8c887163-3bfd-4b43-8cd9-30e0f558f9ab.png?resizew=247)
(1)用尺规作图,作出D、E、F中的任意一点(保留作图痕迹,不写作法和证明,另外两点不需要用尺规作图确定,作草图即可);
(2)若
,求正方形
的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/8c887163-3bfd-4b43-8cd9-30e0f558f9ab.png?resizew=247)
(1)用尺规作图,作出D、E、F中的任意一点(保留作图痕迹,不写作法和证明,另外两点不需要用尺规作图确定,作草图即可);
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c392a819269f7a8c65b3e42edea5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
您最近一年使用:0次
7 . 如图,
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e5abe96b7a5d3ed46ff7cdd8a5296d.png)
(1)在
上求作一点D,使
(尺规作图,保留作图痕迹,不写作法);
(2)在(1)的条件下,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e5abe96b7a5d3ed46ff7cdd8a5296d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/adc68da0-c181-4258-8c38-a444d18189c3.png?resizew=150)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9db4aedfb789ab4f69aa05ffc83c84.png)
(2)在(1)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
您最近一年使用:0次
8 . 【概念认识】
在
中,
,直线l分别交边
于点D,E. 若
,则称直线l为等腰
的“和谐分割线”.
【探索发现】
(1)在
中,
,直线l为等腰
的“和谐分割线”. 小美,小丽探索发现了下列结论.
(i)如图①,小美过点D作
,交
于点H. 证明途径可以用下面的框图表示,请填写其中的空格.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/2847e124-cc8b-403f-9f7e-32b1d463e05e.png?resizew=455)
(ii)请证明小丽所发现的结论.
【解决问题】
(2)如图③,在
中,
,点P为
外一点,P过点P作一条直线l,使直线l是等腰
的“和谐分割线”.(要求:①尺规作图;②保留作图痕迹,写出必要的文字说明)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/9db4a9ce-9368-4402-9d4d-4a2288c50771.png?resizew=143)
【拓展延申】
(3)在
中,
,
,点O为
的外心,P为平面内一点,过点P可作出等腰
的“和谐分割线”,则
的最小值为 .
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17487118ab7a90fc8c91bf0870f3289e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
【探索发现】
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/177f5274-8d5d-43a0-9ea2-d117652d3651.png?resizew=258)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/b0a0d8f7-3f93-46fd-a96f-76edfcee81e8.png?resizew=243)
(i)如图①,小美过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9e49c1a0bb7db8b808b805d08c499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/2847e124-cc8b-403f-9f7e-32b1d463e05e.png?resizew=455)
(ii)请证明小丽所发现的结论.
【解决问题】
(2)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/9db4a9ce-9368-4402-9d4d-4a2288c50771.png?resizew=143)
【拓展延申】
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8b65efe27c217040c135d9e3111aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
您最近一年使用:0次
9 . 如图1,在矩形
中,
,
,点
是边
上的一个动点,连接
,点
是
边上的一点,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/fabcd35e-3e59-4c16-9a2c-05d527c1c7df.jpg?resizew=305)
(1)在图1中作出点
;(要求:尺规作图,保留作图痕迹,不写作法)
(2)当
时,则
________;
(3)随着点
的运动,
是否存在最大值?若存在,请求出最大值;若不存在,请说明理由.
![](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/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14b0234a6b2be80d271dae3205929f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/fabcd35e-3e59-4c16-9a2c-05d527c1c7df.jpg?resizew=305)
(1)在图1中作出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d10f2db7289ff1ec65c47d9af77a9c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1772209a569f87d0539b5d7871d0834.png)
(3)随着点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
您最近一年使用:0次
名校
10 . 如图,在
中,
,
.
(1)求作:
的平分线
交
于点
;(要求:尺规作图,保留作图痕迹,不写作法)
(2)求证:点
为线段
的黄金分割点(即
);
(3)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/396960f8-7670-410b-bc0a-f5c859fb04f0.png?resizew=98)
(1)求作:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bea4ef7a823237d84e4bae51458cef8.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次