如图,在
中,
是
的平分线.请仅用无刻度直尺分别按下列要求作图.(保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989103904587776/2991837785333760/STEM/9464d289-0288-4010-9e76-e1503e543b76.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989103904587776/2991837785333760/STEM/0eff782e-ca12-47cc-9a41-a3b18b4de0ee.png?resizew=211)
(1)在图(1)中,以
为腰作一个等腰三角形;
(2)在图(2)中,以
为边作
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989103904587776/2991837785333760/STEM/9464d289-0288-4010-9e76-e1503e543b76.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989103904587776/2991837785333760/STEM/0eff782e-ca12-47cc-9a41-a3b18b4de0ee.png?resizew=211)
(1)在图(1)中,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在图(2)中,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c948e0f599a9f368543e9811519b854.png)
2022·江西·二模 查看更多[7]
2022年江西省初中名校联盟九年级学习效果检测(二模)数学试题江西省吉安市遂川县2021-2022学年八年级下学期期末数学试题(已下线)黄金卷01-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江西专用)2023年江西省宜春市第八中学中考二模数学试卷江西省九江市都昌县2022-2023学年八年级下学期期末数学试题(已下线)2023年江西二模(无刻度直尺作图)(已下线)2022-2023学年八年级数学下学期期末模拟预测卷02(原卷版)北师大版
更新时间:2022-06-01 10:12:28
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相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
,
,在线段BC上找一点D(与B,C不重合),使得
和
均为等腰三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/4f04eff0-d4a0-42b5-9ae3-16ee342d1058.png?resizew=329)
(1)一同学的解法是,如图1,以B为圆心,以
的长为半径画弧与
交于点D,请根据这种作法说明
和
均为等腰三角形;
(2)尺规作图:请在图2中用另外一种方法找出点D(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/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2677ee9264fd2b6338e4ed853c91e320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/4f04eff0-d4a0-42b5-9ae3-16ee342d1058.png?resizew=329)
(1)一同学的解法是,如图1,以B为圆心,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)尺规作图:请在图2中用另外一种方法找出点D(保留作图痕迹,不写作法).
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解答题-作图题
|
适中
(0.65)
【推荐2】如图1,在
中,
.用尺规作图,在线段
上作点D,使得
(不写作法,保留作图痕迹).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/8db8cf0a-735f-4464-ad62-7a22973e26d3.png?resizew=240)
(1)如图2,小明的作法是:以点B为圆心,
为半径作弧,交
于点D,连接
.请你帮助小明说明这样作图的理由;
(2)请用另一种作法完成作图.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093c6b5aeaa7e581ad4345e137c24c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/8db8cf0a-735f-4464-ad62-7a22973e26d3.png?resizew=240)
(1)如图2,小明的作法是:以点B为圆心,
![](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/d40b319212a7e7528b053e1c7097e966.png)
(2)请用另一种作法完成作图.
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解答题-问答题
|
适中
(0.65)
【推荐1】如图1,已知在等腰△ABC中,AB=AC=
,tan∠ABC=3,BF⊥AC,垂足为F.点D是边AB上一点(不与A,B重合).
(1)求边BC的长;
(2)如图2,联结DF,DF恰好经过△ABC的重心,求线段AD的长;
(3)过点D作DE⊥BC,垂足为E,DE交BF于点Q.联结DF,如果△DQF和△ABC相似,求线段BD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef96e478ce721d7d0c9a5a7814c4274.png)
(1)求边BC的长;
(2)如图2,联结DF,DF恰好经过△ABC的重心,求线段AD的长;
(3)过点D作DE⊥BC,垂足为E,DE交BF于点Q.联结DF,如果△DQF和△ABC相似,求线段BD的长.
![](https://img.xkw.com/dksih/QBM/2021/12/9/2868676766646272/2869054792990720/STEM/77896851-41c3-4ebb-801c-48d45f1c2643.png?resizew=526)
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解答题-应用题
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适中
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名校
【推荐2】学完测高的知识后,学校数学社团的同学对公园里的一棵古树进行了实地测量.如图,先把长为1.8米的标杆
垂直立于地面上的点
处,当树的最高点
、标杆顶端
与地面上的点
在同一直线上时,
米,接着沿斜坡从
走到点
处,此时测得树的最高点
处仰角
,
到地面
的距离
为9米,
为12米,求古树的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7ee687c3ad4a6e97315491c619fc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c69a23d106fd34aa17b22e9c9a8de36.png)
![](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/15a424b50eaeafa6f302ffd95476cb86.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图①、图②均是
的正方形网格,每个小正方形的顶点称为格点,每个小正方形的边长均为1,点A,B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作图,所作图形的顶点均在格点上且两图形不全等,不要求写作法.
为边作一个平行四边形;
(2)在图②中以线段
为边作一个平行四边形,且有一条对角线长为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954253b16a82489bb0e152543428c68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在图②中以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图所示,以
的顶点A为圆心,
为半径作圆,分别交
,
于点
,延长
交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/b1c06456-ce5f-417e-b4ad-654deee9c360.png?resizew=179)
(1)求证:
;
(2)若
,
,求阴影部分弓形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/41a460f95e8ebabac97d572fecea8fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/b1c06456-ce5f-417e-b4ad-654deee9c360.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc4f83f0ba3d3bea9522307e4e4a6a8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e459e24a3c880c0aaa155e56a8dde9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8ceff7afec45baa273b1fe2152bbbd.png)
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