在平面直角坐标系中,直线
:
与
轴交于点
,如图所示,依次作正方形
、正方形
、……、正方形
,使得点
、
、
、……在直线
上,点
、
、
、……在
轴正半轴上,则点
的坐标是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
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更新时间:2023-09-17 10:04:06
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【推荐1】如图,在直角坐标系中,等腰直角三角形
按如图所示的方式放置,其中点
均在一次函数
的图象上,点
均在x轴上.若点
的坐标为
,点
的坐标为
,则点
的坐标为____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbdb04b00158417b635922ecaa16f241.png)
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【推荐2】如图,在平面直角坐标系中有一个边长为1的正方形
,边
,
分别在
轴、
轴上,如果以对角线
为边作第二个正方形
,再以对角线
为边作第三个正方形
,……,照此规律作下去,则点
的坐标为_________ ;点
的坐标为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
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解题方法
【推荐3】如果点P绕定点M旋转180°后与点Q重合,那么称点P与点Q关于点M对称,定点M叫作对称中心,此时,点M是线段PQ的中点.如图,在平面直角坐标系中,△ABO的顶点的坐标分别为A(﹣1,0),B(0,1),O(0,0),点P1,P2,P3,…中相邻两点都关于△ABO的一个顶点对称,点P1与点P2关于点A对称,点P2与点P3关于点B对称,点P3与点P4关于点O对称,点P4与点P5关于点A对称,点P5与P6点关于点B对称,点P6与点P7关于点O对称,…,对称中心分别是A,B,O,A,B,O,…且这些对称中心依次循环,已知点P1的坐标是(﹣1,2),则点P2的坐标为___ ,点P2021的坐标为___ .
![](https://img.xkw.com/dksih/QBM/2022/1/26/2902602420510720/2902927149350912/STEM/61b333b62ead42b699f8a7add15f2d52.png?resizew=185)
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【推荐1】正方形A1B1C1O,A2B2C2C1,A3B3C3C2,…按如图所示放置,点A1,A2,A3,…和C1,C2,C3,…分别在直线y=x+1和x轴上,则点B2019的纵坐标是____ ,点Bn的纵坐标是____ .
![](https://img.xkw.com/dksih/QBM/2019/2/27/2149548691259392/2149682510905344/STEM/d43a0fb1eedd4abda84a3e2cfe6f36d7.png?resizew=150)
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【推荐2】如图,在平面直角坐标系中,四边形
、
、
…
是矩形,其面积分别是
、
、
…
,点
是直线
与
轴的交点,点
、
、
…
在直线
上,点
、
、
…
在
轴上,
,
,
…,
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220a67f3143cc51f6496c874d3ce4f2b.png)
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【推荐1】如图,在平面直角坐标系中,直线l为正比例函数y=x的图象,点A1的坐标为(1,0),过点A1作x轴的垂线交直线l于点D1,以A1D1为边作正方形A1B1C1D1;过点C1作直线l的垂线,垂足为A2,交x轴于点B2,以A2B2为边作正方形A2B2C2D2;过点C2作x轴的垂线,垂足为A3,交直线l于点D3,以A3D3为边作正方形A3B3C3D3,……依此类推,则正方形A2B2C2D2的面积为___________ ;正方形AnBnCnDn的面积为__________ .
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754148926611456/2762016266010624/STEM/5de988d9-0ddd-438a-b999-14a93576f26a.png)
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【推荐2】三个边长都为4cm的正方形硬纸板,若将三个正方形纸板不重叠地放在桌面上,用一个圆形硬纸板将其盖住,下面两种不同摆放类型如图:
![](https://img.xkw.com/dksih/QBM/2021/4/25/2707197551042560/2768288856588288/STEM/5d79535981de4d9895de6ab785f0f251.png?resizew=419)
(1)图①能盖住三个正方形所需的圆形硬纸板最小直径应为_____ cm;
(2)图②能盖住三个正方形所需的圆形硬纸板最小直径为_____ cm;
(3)图③能盖住三个正方形所需的圆形硬纸板最小直径为_____ cm.
![](https://img.xkw.com/dksih/QBM/2021/4/25/2707197551042560/2768288856588288/STEM/5d79535981de4d9895de6ab785f0f251.png?resizew=419)
(1)图①能盖住三个正方形所需的圆形硬纸板最小直径应为
(2)图②能盖住三个正方形所需的圆形硬纸板最小直径为
(3)图③能盖住三个正方形所需的圆形硬纸板最小直径为
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