1 . 在平面直角坐标系中,正方形ABCD的位置如图所示,点A的坐标为
,点D的坐标为
,延长CB交x轴于点A1,作第1个正方形
;延长
交x轴于点
,作第2个正方形
…,按这样的规律进行下去,第2021个正方形的面积为( )
![](https://img.xkw.com/dksih/QBM/2021/1/28/2646005213167616/2663341293248512/STEM/9e84e236-25ce-4a0b-a21b-2e42e4032795.png?resizew=214)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34a524a5e99f86e82ef3db0e7a45e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab35850dbc661ded6456b70767cc6cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220a67f3143cc51f6496c874d3ce4f2b.png)
![](https://img.xkw.com/dksih/QBM/2021/1/28/2646005213167616/2663341293248512/STEM/9e84e236-25ce-4a0b-a21b-2e42e4032795.png?resizew=214)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 如图,在
中,点
分别是
的中点,连接
,四边形
的面积记作
;点
分别是
的中点,连接
,四边形
的面积记作
…,按此规律进行下去,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef354e5c5ff828cc8d27c71badd40f98.png)
__________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
__________ .(
为正整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2c4f20594ab1443c0d8dcce42895f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6495d0fa1d3bbb80c93317444cfa85f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a37ee2b1b0e17139fdaf63449cd77dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7627600b9b73bc37f1773846cd3bea2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e78165108a15387116b25f16e236065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c3a3e699d66daa226b74712cd463e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ce39f4ce25a4dcbb2edcd3b7a91aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6dc2f01f30427243ba01da2dc69c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc30fe35d3e2f526bcb3353e6e0162e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef354e5c5ff828cc8d27c71badd40f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646431697207296/2676796971622400/STEM/bb76ffc1-4d17-41a3-a0c4-6f311a6b2335.png)
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名校
3 . 如图,
,正方形
,正方形
,正方形
,正方形
,…,的顶点
,
,在射线
上,顶点
,在射线
上,连接
交
于点
,连接
交
于点
,连接
交
于点
,…,连接
交
于点
,连接
交
于点
,…,按照这个规律进行下去,设四边形
的面积为
,四边形
的面积为
,四边形
的面积为
,…,,若
,则
等于________ .(用含有正整数
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6b253b7f7aa120fa6dd980bfc5fabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7cb152340ed6b7e9859a49396e13e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1ddc0b8d34776fb6ba02ac87a5c950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09c8e59b4648cd426fa1546c290d40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d053dba977d99b45766dc8a28280ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336d6f969759a73cb2136519c77d207a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b612bdc6dcfab476b42a19d5d76ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b93e3f4eb68d7e137c034d9d32094be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335167cc34e77023b78f63d5a8210ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34876d748f30fa4fc2eb6a686b5ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97abca1a2ea75c810b62a83085b0a6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e5d39423e947af9cdbd58f03f654af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296e45b84cf67a98939aa7334e7d478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b93e3f4eb68d7e137c034d9d32094be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d513111af7c460ba7a7f11cd2ff8ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335167cc34e77023b78f63d5a8210ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd00e830b54b1d0a0b8ed60436edfe9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467c9210f900171270247770d8dda628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2a10f5558793ac1e888d6b0ef22348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2021/1/13/2635211064647680/2642165364588544/STEM/18365693-53d7-461f-ab21-4bd32c567604.png)
您最近一年使用:0次
2021-01-23更新
|
559次组卷
|
2卷引用:辽宁省葫芦岛市连山区2020-2021学年九年级上学期期末数学试题
名校
4 . 在平面直角坐标系中,正方形ABCD的位置如图所示,点A的坐标为
,点D的坐标为
,延长CB交x轴于点
,作正方形
,延长
交x轴于点
,作正方形
按这样的规律进行下去,第2020个正方形的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34a524a5e99f86e82ef3db0e7a45e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab35850dbc661ded6456b70767cc6cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b36d2a16fedf520773c4c8b6a56cb04.png)
![](https://img.xkw.com/dksih/QBM/2021/1/11/2633676503334912/2636813572980736/STEM/aaa54e1de75e41569545ccee28cf769d.png?resizew=254)
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2021-01-15更新
|
486次组卷
|
6卷引用:重庆市缙云教育联盟2020-2021学年九年级上学期期末数学试题
真题
5 . 如图,边长为4的等边△ABC,AC边在x轴上,点B在y轴的正半轴上,以OB为边作等边△OBA1,边OA1与AB交于点O1,以O1B为边作等边△O1BA2,边O1A2与A1B交于点O2,以O2B为边作等边△O2BA3,边O2A3与A2B交于点O3,…,依此规律继续作等边△On﹣1BAn,记△OO1A的面积为S1,△O1O2A1的面积为S2,△O2O3A2的面积为S3,…,△On﹣1OnAn﹣1的面积为Sn,则Sn=__ .(n≥2,且n为整数)
![](https://img.xkw.com/dksih/QBM/2019/10/8/2307603083206656/2307742197301248/STEM/a8a9db3350ce410daf25693b339f11df.png?resizew=145)
您最近一年使用:0次
2020-09-22更新
|
510次组卷
|
2卷引用:辽宁省辽阳市文圣区2019-2020学年八年级下学期期末数学试题
名校
解题方法
6 . [探索规律]
如图①,在△ABC中,点D、E、F分别在AB、 BC、 AC上,且DF//BC,EF//AB.设△ADF的边DF上的高为h1,△EFC的边CE上的高为h2.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/c71a5258-4bff-47fc-905e-b3ea84f955df.png?resizew=278)
(1)若△ADF、△EFC的面积分别为4和1,则
=______;
(2)某校数学兴趣小组的同学对△ADF、△EFC、四边形BDEF的面积关系进行了研究设△ADF、△EFC、四边形BDEF的面积分别为S1、 S2、S, EC的长为a,则S2=______ (用含a和h2的式子表示);S1=_____ (用含a、h1和h2的式子表示);S=______(用含a、h1的式子表示);从而得出S=2
.
[解决问题]
(3)如图②,在△ABC中,点D、E分别在AB、AC上,点F、G在BC上,且DE//BC,DF//EG.若△ADE、△DBF.△EGC的面积分别为2、3、 5,求△ABC的面积.
如图①,在△ABC中,点D、E、F分别在AB、 BC、 AC上,且DF//BC,EF//AB.设△ADF的边DF上的高为h1,△EFC的边CE上的高为h2.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/c71a5258-4bff-47fc-905e-b3ea84f955df.png?resizew=278)
(1)若△ADF、△EFC的面积分别为4和1,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bc9e7badfafa2bfd9ece72da1ac71a.png)
(2)某校数学兴趣小组的同学对△ADF、△EFC、四边形BDEF的面积关系进行了研究设△ADF、△EFC、四边形BDEF的面积分别为S1、 S2、S, EC的长为a,则S2=______ (用含a和h2的式子表示);S1=_____ (用含a、h1和h2的式子表示);S=______(用含a、h1的式子表示);从而得出S=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66950fa90903fa630a037586c57be29b.png)
[解决问题]
(3)如图②,在△ABC中,点D、E分别在AB、AC上,点F、G在BC上,且DE//BC,DF//EG.若△ADE、△DBF.△EGC的面积分别为2、3、 5,求△ABC的面积.
您最近一年使用:0次
2020-07-18更新
|
499次组卷
|
3卷引用:江苏省苏州市姑苏区六校联考2019- 2020学年八年级下学期期末数学试题
江苏省苏州市姑苏区六校联考2019- 2020学年八年级下学期期末数学试题江苏省苏州市姑苏区振华中学2020-2021学年八年级下学期期末数学模拟试卷(已下线)九年级数学期末真题【考题猜想,压轴60题21个考点专练】-2023-2024学年九年级数学上学期期末考点大串讲(苏科版)
7 . 在平面直角坐标系
中,正方形ABCD的位置如图所示,点
的坐标为
,点
的坐标为
,延长
交
轴于点
,作正方形
,延长
交
轴于点
,作正方形
,…按这样的规律进行下去,第
个正方形的面积为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34a524a5e99f86e82ef3db0e7a45e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab35850dbc661ded6456b70767cc6cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220a67f3143cc51f6496c874d3ce4f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/ab079fff-e7aa-4b05-8fd4-5bb95b4890aa.jpg?resizew=324)
您最近一年使用:0次
真题
8 . 如图,
,正方形
,正方形
,正方形
,正方形
,…,的顶点
,在射线
上,顶点
,在射线
上,连接
交
于点
,连接
交
于点
,连接
交
于点
,…,连接
交
于点
,连接
交
于点
,…,按照这个规律进行下去,设
与
的面积之和为
与
的面积之和为
与
的面积之和为
,…,若
,则
等于__________ .(用含有正整数
的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b1460f537e7fe29106006c0ca23e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7cb152340ed6b7e9859a49396e13e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1ddc0b8d34776fb6ba02ac87a5c950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09c8e59b4648cd426fa1546c290d40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d053dba977d99b45766dc8a28280ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac83bd9711ccbb662335c4b9683337a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8983bc0b615b4069c907205584a4d98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b93e3f4eb68d7e137c034d9d32094be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
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2020-08-17更新
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939次组卷
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6卷引用:重庆市缙云教育联盟2020-2021学年七年级上学期期末数学试题
9 . 在平面坐标系中,正方形
的位置如图所示,点
的坐标为
,点
的坐标为
,延长
交
轴于点
,作正方形
,正方形
的面积为______ ,延长
交
轴于点
,作正方形
,……按这样的规律进行下去,正方形
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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2020-02-02更新
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3卷引用:河北省沧州市2019-2020学年九年级上学期期末数学试题
河北省沧州市2019-2020学年九年级上学期期末数学试题河北省石家庄市新乐市2019-2020学年九年级上学期期末数学试题(已下线)热点专题2规律探究问题-2020年《三步冲刺中考·数学》之热点专题冲刺(广东专用)
10 . 在平面直角坐标系中,正方形ABCD的位置如图所示,点A的坐标为(1,0),点D的坐标为(0,2).延长CB交x轴于点A1,作第1个正方形A1B1C1C;延长C1B1交x轴于点A2,作第2个正方形A2B2C2C1,…,按这样的规律进行下去,第2019个正方形的面积是_________ .
![](https://img.xkw.com/dksih/QBM/2019/12/5/2348672958054400/2350082408734720/STEM/1223ba462518452696434365b75761bc.png?resizew=211)
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2019-12-07更新
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5卷引用:广东省深圳市龙岗区百合外国语学校2018-2019学年九年级上学期期末数学试题
广东省深圳市龙岗区百合外国语学校2018-2019学年九年级上学期期末数学试题(已下线)期末难点特训(四) 选填压轴50道-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(北师大版)山东省即墨市萃英中学2019-2020学年九年级上学期学业水平诊断数学试题辽宁省丹东市第二十一中学2019-2020学年九年级上学期10月月考数学试题广东省梅州市东山学校2021-2022学年 九年级上学期数学第三次月考试卷