如图,在平面直角坐标系中,
为直角三角形,
轴,
轴,
,B点坐标为
,将
沿
翻折,B点落在D点位置,
交y轴于点E.
(1)尺规作图:画出完整的图形(不写作法,保留作图痕迹)
(2)求出点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624dffd30b66a5e4de57362b32b2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05de5eef286a1b48012246c0cf88a1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/a64420fc-7f9b-41da-9d6e-06e7a5a072da.png?resizew=118)
(1)尺规作图:画出完整的图形(不写作法,保留作图痕迹)
(2)求出点D的坐标.
更新时间:2023-09-24 16:23:41
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相似题推荐
解答题-作图题
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【推荐1】如图,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/431eb4ea-3b64-4a7d-ba7e-e0b71e29a837.jpg?resizew=164)
(1)在
边上求作一点
,使点
到
和
的距离相等;
(2)画
的高
.(不写作法,保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/431eb4ea-3b64-4a7d-ba7e-e0b71e29a837.jpg?resizew=164)
(1)在
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)画
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解答题-作图题
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【推荐2】“黄金分割”给人以美感,它在建筑、艺术等领域有着广泛的应用.如图①,点C把线段
分成两部分,如果
,那么称线段
被点C黄金分割,点C为线段
的黄金分割点.
与
的比称为黄金比,它们的比值为
.请完成下面的问题:
(1)如图②,
,点A在
边上,
.请在
边上用无刻度的直尺和圆规作出点B,使得
与
的比为黄金比;(不写作法,保留作图痕迹)
(2)如图③,在
中,
,若
,请你求出
的度数.
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(1)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b5d523373b8cbfa33e42a1bf154544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/0f34ca4c-5439-4406-b8da-b14caa5794ac.png?resizew=107)
(2)如图③,在
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/6c1ea3b4-5fdf-48b8-96fd-1b4911c5ee64.png?resizew=144)
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解答题-证明题
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【推荐1】如图,在矩形
中,
的平分线交
于点E,
于点F,
于点G,
与
交于点O.
是正方形;
(2)若
,求证:
;
(3)在(2)的条件下,已知
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c132b1634ce91b5879940593c4c65716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e875bf5e28d3c4fca84922686dd5eb.png)
(3)在(2)的条件下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
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解答题-证明题
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【推荐2】如图,在
中,
,
交于
点,点
,
在
上,且
,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/0c84b7d2-20b9-4edd-b39e-7f750788c654.png?resizew=302)
(1)求证:四边形
是矩形;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/0c84b7d2-20b9-4edd-b39e-7f750788c654.png?resizew=302)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
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解答题-问答题
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【推荐1】小丽设计了一种测量树高的方法:她将一根细线的一端固定在半圆形量角器的圆心B处,在细线的另一端C处系一个小重物,制成了一个简单的测角仪(如图1);将此测角仪放在眼前,使视线沿着仪器的直径刚好到达树的最高点(如图2,图3);小丽眼睛(即点A)离地
米,现测得
,小丽与树的水平距离是5米,则树高是多少米?(结果保留一位小数 ,参考数据:
,
,
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
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解答题-问答题
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【推荐2】如图,在平面直角坐标系xOy中,矩形ABCD各边都平行于坐标轴,且A(-2,2),C(3,-2).对矩形ABCD及其内部的点进行如下操作:把每个点的横坐标乘以a,纵坐标乘以b,将得到的点再向右平移k(
)个单位,得到矩形
及其内部的点(
分别与ABCD对应).E(2,1)经过上述操作后的对应点记为
.
![](https://img.xkw.com/dksih/QBM/2016/7/18/1574218751885312/1574218758094848/STEM/8866a0ffa9074447afa9d4389643a72d.png)
(1)点D的坐标为 ,若a=2,b=-3,k=2,则点
的坐标为 ;
(2)若
(1,4),
(6,-4),求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2d87651574e905b382cfc0f021bbca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395b10c2e4418b1c1401a57531473bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395b10c2e4418b1c1401a57531473bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73c2dc5dd41db62a3ee2947606021da.png)
![](https://img.xkw.com/dksih/QBM/2016/7/18/1574218751885312/1574218758094848/STEM/8866a0ffa9074447afa9d4389643a72d.png)
(1)点D的坐标为 ,若a=2,b=-3,k=2,则点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1001e8c58836f274a292e52010e92e92.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf135f00743fe45aa18897558d58312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/416e0fb5031468af5675c2b7b0be14f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73c2dc5dd41db62a3ee2947606021da.png)
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解答题-作图题
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【推荐3】先阅读材料,再解答问题:
小明同学在学习与圆有关的角时了解到:在同圆或等圆中,同弧(或等弧)所对的圆周角相等.如图1,点A,B,C,D均为
上的点,则有
.小明还发现,若点E在
外,且与点D在直线
同侧,则有
.
请你参考小明得出的结论,解答下列问题:
问题:如图2,在平面直角坐标系
中,点A的坐标为
,点B的坐标为
,点C的坐标为
.
(1)在图2中作出
的外接圆(保留必要的作图痕迹,不写作法),并求出此圆与x轴的另一个交点的坐标;
(2)点P为x轴正半轴上的一个动点,连接
、
,当
达到最大时,直接写出此时点P的坐标.
小明同学在学习与圆有关的角时了解到:在同圆或等圆中,同弧(或等弧)所对的圆周角相等.如图1,点A,B,C,D均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1beff025b32f688316009552d2fd8e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ae87d0c688a578d73b5b8c2f0223f6.png)
请你参考小明得出的结论,解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/d31b1203-985d-4c0b-92e0-e2e803db03c7.png?resizew=384)
问题:如图2,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0167434c2c1a16e59e89d436ac0a1278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
(1)在图2中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)点P为x轴正半轴上的一个动点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
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