如图,在平行四边形
中,将
绕点C顺时针旋转30°得到
,将
绕点A顺时针旋转30°得到
,连接
、
、
.点M、N分别是
、
的中点,若
的面积是2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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23-24九年级上·重庆铜梁·期末 查看更多[3]
重庆市铜梁区2023-2024学年九年级上学期期末数学试题重庆市铜梁区2023-2024学年九年级上学期期末数学试题(已下线)专题03 平行四边形的性质和判定期末真题汇编【八大题型+优选提升题】-备战2023-2024学年八年级数学下学期期末真题分类汇编(人教版)
更新时间:2024-02-26 18:37:00
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【推荐1】如图,正方形ABCD的边长为6,点E,F分别在边AB,BC上,若F是BC的中点,且∠EDF=45°,则DE的长为 _____ .
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【推荐2】如图,已知等腰△ABC中,AB=AC,∠BAC=120°,AD⊥BC于点D,点P是BA延长线上一点,点O是线段AD上一点,OP=OC,下面的结论:①∠APO+∠DCO=30°;②△OPC是等边三角形;③AC=AO+AP;④S△ABC=S四边形AOCP,其中正确的是_____________ .(填序号)
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【推荐1】如图,已知⊙O的弦AB与半径OC垂直,D为垂足,OD=DC,AB=
,点E在⊙O上,∠EOA=30°,则△EOC的面积为____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/d758c433-2adf-4c33-a5a1-3b39906d6520.png?resizew=116)
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【推荐2】在Rt△ABC中,∠C=90°,∠A=30°,c=2,则a=______ ,b=_______ .
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【推荐1】在
中,
,
,直线
垂直平分
(垂足为
,直线
与
的另一边相交于点
,且
时,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
______ .
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名校
【推荐2】如图,在
中,
为
边上的点,
,连接
交
于点
,
的面积为
,则
的面积为_______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9487db787bae350d8da3ed7aee5d3746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐1】如图,四边形
是矩形,对角线相交于点
,点
为线段
上一点(不含端点),点
是点
关于
的对称点,连接
与
相交于点
.若
,
,则
的长___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】边长为4的正方形ABCD中,E、F、G分别为AB、CD、AD上的中点,连接EF、CG交于点N,以点C为圆心,CB为半径的弧交EF于点M,则MN=_________ .
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