如图,P是等边三角形ABC内的一点,连结PA,PB,PC,以BP为边作∠PBQ=60°,且BP=BQ,连结CQ.
(1)观察并猜想AP与CQ之间的大小关系,并说明理由.
(2)若PA=PC=1,PB=
,求证:PC⊥CQ.
(1)观察并猜想AP与CQ之间的大小关系,并说明理由.
(2)若PA=PC=1,PB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/426a43d4-474f-4b96-84e6-671fb94f14b6.png?resizew=120)
21-22八年级上·浙江绍兴·期中 查看更多[4]
浙江省绍兴市诸暨市绍初教育集团、滨江初中教育集团2021-2022学年八年级上学期期中数学试题浙江省金华市东阳市吴宁联盟2022-2023学年八年级上学期期中数学试题浙江省宁波市鄞州区鄞州实验中学2023-2024学年八年级上学期期中数学试题(已下线)第三章 图形的平移与旋转达标测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(北师大版)
更新时间:2021-12-10 12:36:26
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解答题-证明题
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【推荐1】已知,在菱形ABCD中,
,点P在射线AB上,点Q在射线BC上,且
,连接AC,AQ,CP,直线AQ与直线CP交于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/a6cd36db-2c6d-4060-8908-2cecbcfc17fd.png?resizew=418)
(1)如图1,当P、Q两点分别在线段AB和线段BC上时,求证:
:
(2)如图2,当P、Q两点分别到线段AB和线段BC的延长线上时;
①求
的度数;
②连接DH,过点D作
交PH延长线于点E.若
,求CE的长(用含m,n的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dfc11d7222679b9a9c8c58bfee6aa32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/a6cd36db-2c6d-4060-8908-2cecbcfc17fd.png?resizew=418)
(1)如图1,当P、Q两点分别在线段AB和线段BC上时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024520fbc237f1a577d315cfd3a8aec0.png)
(2)如图2,当P、Q两点分别到线段AB和线段BC的延长线上时;
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732029c821ce7adebbc6547618fe78eb.png)
②连接DH,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d0f5af28403e608058600c4ea870c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f894b6b3b729435569785a3240f56de6.png)
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解答题-作图题
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【推荐2】阅读理解:我们给出如下定义:若一个四边形中存在一组相邻两边的平方和等于一条对角线的平方,则称这个四边形为勾股四边形,这两条相邻的边称为这个四边形的勾股边.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/d3878608-a6cc-44e0-9264-24417c97568e.png?resizew=220)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/4918e51e-0241-460e-9b47-f4b7c6fb24aa.png?resizew=236)
(1)写出两个是勾股四边形的特殊四边形:____________,____________.
(2)如图1,已知格点(小正方形的顶点)
,
,
,请你画出以格点为顶点,OA,OB为勾股边且对角线相等的两个勾股四边形OAMB.
(3)如图2,将
绕顶点B按顺时针方向旋转60°,得到
,连接AD,DC,
,那么线段DC,AC,BC的数量关系为_______________.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/d3878608-a6cc-44e0-9264-24417c97568e.png?resizew=220)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/4918e51e-0241-460e-9b47-f4b7c6fb24aa.png?resizew=236)
(1)写出两个是勾股四边形的特殊四边形:____________,____________.
(2)如图1,已知格点(小正方形的顶点)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d429efe96d68065e7d433c996682791d.png)
(3)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fd12581cde7779e735bd3f4ad6d1c1.png)
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【推荐1】如图,在平面直角坐标系
中,一次函数
的图象与反比例函数
的图象交于点
和点
.
![](https://img.xkw.com/dksih/QBM/2021/9/29/2818586530488320/2826510670807040/STEM/6fb81e44-b7b7-43aa-8e79-ca856182faa6.png)
(1)求一次函数与反比例函数的表达式;
(2)直线
与
轴交于点
,与
轴交于点
.
①过点
作
轴交反比例函数
的图象于点
,连接
,试判断
的形状,并说明理由;
②设
是
轴上一点,当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c143e0781facdd4e4b6db9854e0ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb79a1b0c6dc78e6de17de6bed477fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a6be776cdd229e5c1339265b23624a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2e8d405145573838999a8695cb8332.png)
![](https://img.xkw.com/dksih/QBM/2021/9/29/2818586530488320/2826510670807040/STEM/6fb81e44-b7b7-43aa-8e79-ca856182faa6.png)
(1)求一次函数与反比例函数的表达式;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97887729b8d7afb6a6336ba761d76c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb79a1b0c6dc78e6de17de6bed477fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33c2aa4cb5a3b8da3b188ab6a21520c.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df9d27201492f53e531d454b08cc21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解答题-问答题
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【推荐2】如图,在
的正方形网格中,每个小正方形的边长都是1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/70af3381-70eb-4cb9-b8b8-797e1d8bc20b.png?resizew=255)
(1)分别求出图①中线段
、
的长度;
(2)在图②中画线段
,使得
,以
、
、
三条线段能否构成直角三角形?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca9596f4b49db923a41530e1973c32e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/70af3381-70eb-4cb9-b8b8-797e1d8bc20b.png?resizew=255)
(1)分别求出图①中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在图②中画线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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