1 . 如图
,在等腰三角形
中,
,
,
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/999dc9d3-84ae-41c5-9b35-5363bc231104.jpg?resizew=289)
(1)请在图
中作
边
上的高
;(要求:尺规作图,不写作法,保留作图痕迹)
(2)如图
,若
、
分别是线段
、
上的动点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e0b41cd45fba881194a02ec19bc26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/999dc9d3-84ae-41c5-9b35-5363bc231104.jpg?resizew=289)
(1)请在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/e69d2b798744645af88a4fa411344a83.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed406cd475a8b79d13c9ab2e41bf584d.png)
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2 . 如图,在
中.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/9f2da432-bb7a-488c-9361-ed10e118f985.png?resizew=215)
(1)尺规作图:作线段
的垂直平分线交
于点
,连接
.(保留作图痕迹)
(2)在(1)的条件下,若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/9f2da432-bb7a-488c-9361-ed10e118f985.png?resizew=215)
(1)尺规作图:作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dd0dc47efa9e663001492b69b60b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
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3 . 如图,在平面直角坐标系中,
的三个顶点的坐标分别为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/a88b502c-dc3e-425b-aae0-a99bd95ecc2c.png?resizew=213)
(1)在图中作出
关于y轴的对称图形
,
(2)请直接写出
的坐标:
_______;
________;
_______
(3)尺规作图:在x轴上找一点P,使得
(要求:保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0fda1cebef2724a678e3890773ae48.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/a88b502c-dc3e-425b-aae0-a99bd95ecc2c.png?resizew=213)
(1)在图中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c2f8d68d0d9df608952469c541a65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)尺规作图:在x轴上找一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
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4 . 如图,在
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
的垂直平分线交
于点
,交
于点
(不写作法,保留作图痕迹)
(2)连接
,若
,
的周长是
,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/f52a58fbaf4fea03567e88a9f0f6e37e.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9822e15763be5cb6c49936df274a6748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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2023-12-18更新
|
72次组卷
|
10卷引用:【校级联考】河北省唐山市乐亭县2018-2019学年八年级上学期期末考试数学试题
【校级联考】河北省唐山市乐亭县2018-2019学年八年级上学期期末考试数学试题福建省福州市福州延安中学2018-2019学年八年级上学期期中数学试题河南省信阳市潢川县2019-2020学年八年级上学期期中数学试题2023年广东省汕头市潮南区陈店镇中考二模数学试题山东省德州市禹城市2023-2024学年八年级上学期期中数学试题广东省肇庆市第二中学2023-2024学年八年级上学期期中数学试题2024年广东省茂名市化州市中考一模数学试题广东省茂名市化州市2023-2024学年八年级下学期期中数学试题(已下线)第04讲 等腰三角形的性质和应用(知识解读+达标检测)-2023-2024学年七年级数学下册《知识解读·题型专练》(北师大版)安徽省宿州市埇桥区2023-2024学年七年级下学期第三次月考数学试题
5 . 如图,A,B是小河同侧的两个村庄,为解决用水问题,两村合资在河上修建一座水站.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/f72c29da-2ca7-413b-9eea-0eb0fd1d6058.png?resizew=484)
(1)为使水站到A村和B村的距离相等,求水站的位置;
(2)为使水站到A村和B村的水管总长最短,求水站的位置.
(尺规作图,不写作法,保留作图痕迹,写出结论).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/f72c29da-2ca7-413b-9eea-0eb0fd1d6058.png?resizew=484)
(1)为使水站到A村和B村的距离相等,求水站的位置;
(2)为使水站到A村和B村的水管总长最短,求水站的位置.
(尺规作图,不写作法,保留作图痕迹,写出结论).
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6 . 如图,在钝角
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/5784087f-8ccc-4bce-9e8c-6e25e5eda7a8.png?resizew=240)
(1)尺规作图:作
的垂直平分线,与边
、
分别交于点D、E(不写作法,不下结论,保留作图痕迹)
(2)在(1)的条件下,过点B作
交
的延长线于点H,连接
,求证
.请补完图形,并完成下列证明过程:
证明:∵
是
的垂直平分线(已知)
∴
① ,
,
∴ ② (等腰三角形三线合一)
∵
, ③
∴
(在同一平面内,垂直于同一条直线的两条直线平行)
∴
( ④ 填写文字依据)
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29edec1f0ccd57a096fa9ef344d23568.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/5784087f-8ccc-4bce-9e8c-6e25e5eda7a8.png?resizew=240)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)在(1)的条件下,过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ad0a87392245e4bf5bafe26089803b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8b1d66af5b02eca0a171cc23dca1bf.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e2152ac6e0a9abe7378ca935fa593e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
∴ ② (等腰三角形三线合一)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e60c00c032756bceb4bf7a4d8dd516.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d282a919ded2068979ddaf2cc0e98b3b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8b1d66af5b02eca0a171cc23dca1bf.png)
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2024-02-20更新
|
53次组卷
|
2卷引用:重庆市万州区2023-2024学年八年级上学期期末数学试题
7 . 如图这是一个残缺的圆形部件,已知
是该部件圆弧上的三点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/359bc0e4-0105-4c3a-8347-c4c39ef29213.png?resizew=129)
(1)利用尺规作图作出该部件的圆心;(保留作图痕迹)
(2)若
是等腰三角形,底边
,腰
,求该部件的半径
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/359bc0e4-0105-4c3a-8347-c4c39ef29213.png?resizew=129)
(1)利用尺规作图作出该部件的圆心;(保留作图痕迹)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9d0d90bf492735a174a88df5704f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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8 . 如图,在
中,
,
是
的一个外角.
【实践操作】
根据要求进行尺规作图,并在图中标明相应字母.(保留作图痕迹,不要求写出作法.)
(1)作
的平分线
;
(2)作线段
的垂直平分线,与
交于点
,与
交于点
,连接
,
;
【探究计算】
(3)若
,求
的度数.
![](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/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/338f745e-bec7-4b47-8d56-ceaaf526c517.png?resizew=151)
【实践操作】
根据要求进行尺规作图,并在图中标明相应字母.(保留作图痕迹,不要求写出作法.)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
【探究计算】
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af84da155bf0f02374cd70ea6eab796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
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9 . 如图,在
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/e0564166-bdfe-425e-b871-e176be290d95.png?resizew=251)
(1)作线段
的垂直平分线,分别交
,
于点
,
;(尺规作图,保留作图痕迹,不要求写作法)
(2)连接
,若
,求
.
![](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/f86c589939053ce21ce0a67cf40054a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/e0564166-bdfe-425e-b871-e176be290d95.png?resizew=251)
(1)作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18444ec3e5e3b8a0cf488732c34866d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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10 . 如图,在
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/fc0a71a6-7340-461e-b970-173ad5eb6b21.png?resizew=166)
(1)尺规作图:在线段
上作一点
,使得
(不写作法,保留作图痕迹);
(2)若点
到直线
距离为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114dda6ab83a2c3ec02fc61182e030e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/fc0a71a6-7340-461e-b970-173ad5eb6b21.png?resizew=166)
(1)尺规作图:在线段
![](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/5a1b7513e09cccf40c3a483064b97e48.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
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