如图为
正方形网格,每个正方形边长为1,正方形
顶点都在个点上,点E也在格点上.
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599816481832960/2599840562069504/STEM/0d344f3ef75a46baba6c07d7c280ac5d.png?resizew=160)
(1)求正方形
的面积;
(2)画一个以
为一边且顶点在格点上的正方形,并求三角形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777d8fccf0cf8b55a68488fe48b78744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599816481832960/2599840562069504/STEM/0d344f3ef75a46baba6c07d7c280ac5d.png?resizew=160)
(1)求正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)画一个以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
19-20七年级·浙江·期中 查看更多[3]
(已下线)【新东方】【2020】【初一上】【期中考】【YPZX】【初中数学】【叶嵩图片版收集】【张晶doc】(已下线)【新东方】绍兴qw5浙江省绍兴市元培中学2020-2021学年七年级上学期期中数学试题
更新时间:2020-11-24 14:12:04
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相似题推荐
解答题-问答题
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适中
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【推荐1】如图,在
的正方形网格中,每个小正方形的边长均为1,线段
,线段
的端点均在小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740877464977408/2744888609808384/STEM/c2f426e1-8849-4023-aa0a-717c792669b3.png?resizew=398)
(1)在图中画
,点
在小正方形的格点上,使
,且
;
(2)在图中画面积为6的
,点
在小正方形的格点上,连接
,
,且
,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aad8df6dbb94b83245e2c80e1a329ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740877464977408/2744888609808384/STEM/c2f426e1-8849-4023-aa0a-717c792669b3.png?resizew=398)
(1)在图中画
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a17dd799f42c7eaeea7b55227333bd7.png)
(2)在图中画面积为6的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700d23ec3e0d73c7a576b5f4b3b8a6b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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解答题-作图题
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【推荐2】如图,在正方形网格中,每个小正方形的边长为1,点A、B、C都在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/515de193-70c5-416b-bc23-5ae137ef55d9.png?resizew=158)
(1)用尺规作出△ABC外接圆的圆心O;
(2)用无刻度的直尺作□ACDO,并证明CD为⊙O的切线.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/515de193-70c5-416b-bc23-5ae137ef55d9.png?resizew=158)
(1)用尺规作出△ABC外接圆的圆心O;
(2)用无刻度的直尺作□ACDO,并证明CD为⊙O的切线.
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解答题-问答题
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【推荐3】综合与实践
如下图,在边长为1的正方形网格中,连接格点
、
和
、
,
和
相交于点
,求
的值.
方法归纳:求一个锐角的三角函数值,我们往往需要找出(或构造出)一个直角三角形.观察发现问题中
不在直角三角形中,我们常常利用网格画平行线等方法解决此类问题,比如连接格点
,
,可得
,则
,连接
,那么
就变换到
中.
(1)上图中
______;
(2)如下图,
,
,
,
四点均在边长为1的正方形网格的格点上,
与
相交于点
,求
的值.
(3)如下图,
,
,
,
,
五点均在边长为1的正方形网格的格点上,
交
的延长线于点
,求
的值.
如下图,在边长为1的正方形网格中,连接格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae8d7460b99722ad5f8f15aab09c2fa.png)
方法归纳:求一个锐角的三角函数值,我们往往需要找出(或构造出)一个直角三角形.观察发现问题中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b91ef5ffdba260ce27659dce5c4ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138ce47ba6356ac3feafdda290bc544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf8f34823528fdad222755e8351526a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b91ef5ffdba260ce27659dce5c4ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2ab7668ce5e360663a2b7c387fa8b.png)
(1)上图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a8d92bca9eaa910d80a92cd6426897.png)
(2)如下图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead194894742c35d69d5f85b7228e768.png)
(3)如下图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f3c1987424599ba33c84599febf556.png)
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解答题-作图题
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【推荐1】如图所示的方角铁皮,要求用一条直线 将其分成面积相等的两部分 ,请你设计两种不同 的分割方案(用铅笔画图,不写画法,保留作图痕迹或简要的文字说明).
![](https://img.xkw.com/dksih/QBM/2019/10/26/2320126414635008/2320434968027136/STEM/f690cbe7e3e340a9941f71c4638cd51e.png?resizew=446)
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解答题-计算题
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【推荐2】小丽想用一块面积为
的正方形纸片,沿着边的方向裁出一块面积为
的长方形纸片,使它的长宽之比为
,小丽能用这块纸片裁出符合要求的纸片吗?通过计算说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6565798f0e2b2d446a946788db2b21d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e3c423b144dc231199f265e6a138e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b4fa4ceba59ffc1e12738d4029b66e.png)
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【推荐3】综合与探究
如图1,在
中,
,
,
,点D在射线
上,点E在射线
上,动点P在射线
上,沿
方向,以每秒1个单位的速度匀速运动,到达点E时停止.以
为边作正方形
.设点P的运动时间为t秒,以正方形
的面积为S,探究S与t的关系.
①当
时,
__________.
②S关于t的函数解析式为__________.
(2)如图2,当点P由点D运动到点E时,经探究发现S是关于t的二次函数,并绘制成如图3所示的图案.请根据图案信息,求S关于t的函数解析式及线段
的长.
(3)若存在4个时刻,
,
,
,
对应的正方形
的面积均相等,则
__________.
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb00da15879743c2b80118b20c401f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cc9b0c04b7fee3cace88c6ec9286ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cc9b0c04b7fee3cace88c6ec9286ab.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
②S关于t的函数解析式为__________.
(2)如图2,当点P由点D运动到点E时,经探究发现S是关于t的二次函数,并绘制成如图3所示的图案.请根据图案信息,求S关于t的函数解析式及线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)若存在4个时刻,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db31d2bbc9b044646fd026f239e7b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83e309ef81787b99b754961e64ccb73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cc9b0c04b7fee3cace88c6ec9286ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77ebb8c74b77b1bf349017a26a234b7.png)
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