在正方形ABCD中,E是CD边上一点
,AE,BD交于点F.
,交BC边于点H.求证:
;
(2)AE的垂直平分线分别与AD,AE,BD交于点P,M,N,连接CN.
①依题意在图2中补全图形;
②用等式表示线段AB、DE与CN之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1349d7a521dbf3d13be8f52aac01c147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c31f727a845520711124b398da2dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91b113aa2eac0107e36a5b12d12e57c.png)
(2)AE的垂直平分线分别与AD,AE,BD交于点P,M,N,连接CN.
①依题意在图2中补全图形;
②用等式表示线段AB、DE与CN之间的数量关系,并证明.
更新时间:2022-05-04 13:26:56
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解答题-作图题
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【推荐1】如图,
为等边三角形,点D为BC延长线上的一点,射线CM平分∠ACD,E是CM上一点,且CE=BD,连接AD、AE、DE .
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(2)试判断
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解答题-证明题
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【推荐2】已知△ABC为等边三角形,D为AB边所在的直线上的动点,连接DC,以DC为边在DC两侧作等边△DCE和等边△DCF(点E在DC的右侧或上侧,点F在DC左侧或下侧),连接AE、BF
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(1)如图1,若点D在AB边上,请你通过观察,测量,猜想线段AE、BF和AB有怎样的数量关系?并证明你的结论;
(2)如图2,若点D在AB的延长线上,其他条件不变,线段AE、BF和AB有怎样的数量关系?请直接写出结论(不需要证明);
(3)若点D在AB的反向延长线上,其他条件不变,请在图3中画出图形,探究线段AE、BF和AB有怎样的数量关系,并直接写出结论(不需要证明)
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(2)如图2,若点D在AB的延长线上,其他条件不变,线段AE、BF和AB有怎样的数量关系?请直接写出结论(不需要证明);
(3)若点D在AB的反向延长线上,其他条件不变,请在图3中画出图形,探究线段AE、BF和AB有怎样的数量关系,并直接写出结论(不需要证明)
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解答题-作图题
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名校
【推荐1】如图,已知四边形ABCD是矩形.
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解答题-作图题
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【推荐2】如图,反比例函数
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(2)请用无刻度的直尺和圆规作出
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【推荐1】如图1,在▱
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【推荐2】如图,
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【推荐1】如图,在边长为1的正方形
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【推荐2】综合与实践
问题情境:
已知四边形
是正方形,
是对角线,将等腰直角三角形
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分别与边
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特例感知:
(1)如图1,当
平分
时,
①试判断
和
的数量关系,并说明理由;
②
和
的数量关系是____________.
深入探究:
(2)如图2,当
不是
的平分线时,试判断
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问题情境:
已知四边形
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特例感知:
(1)如图1,当
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①试判断
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②
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深入探究:
(2)如图2,当
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