如图,已知平行四边形ABCD.
![](https://img.xkw.com/dksih/QBM/2022/1/28/2904088610684928/2913469892001792/STEM/88aa5893c0704218a860389ef658c9f9.png?resizew=277)
(1)用尺规完成以下基本作图:在CB上截取CE,使CE=CD,连接DE,作∠ABC的平分线BF交AD于点F.(保留作图痕迹,不写作法)
(2)在(1)所作的图形中,证明四边形BEDF为平行四边形.
![](https://img.xkw.com/dksih/QBM/2022/1/28/2904088610684928/2913469892001792/STEM/88aa5893c0704218a860389ef658c9f9.png?resizew=277)
(1)用尺规完成以下基本作图:在CB上截取CE,使CE=CD,连接DE,作∠ABC的平分线BF交AD于点F.(保留作图痕迹,不写作法)
(2)在(1)所作的图形中,证明四边形BEDF为平行四边形.
更新时间:2022-02-10 16:52:34
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解答题-作图题
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【推荐1】如图,已知线段
,请用尺规作图法,求作等腰直角
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解答题-作图题
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【推荐2】已知:如图,线段a和线段b
![](https://img.xkw.com/dksih/QBM/2023/2/27/3183701657501696/3185335159562240/STEM/7333623696964e0895070860c6e27181.png?resizew=158)
(1)尺规作图:求作线段
,并在线段
的延长线上,求作线段
;(作图工具只限直尺和圆规,保留作图痕迹)
(2)若
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分别是
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的中点,求
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的式子表示).
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(1)尺规作图:求作线段
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(2)若
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解答题-作图题
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适中
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【推荐1】如图,在
中,
是
边上一点,且
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(1)尺规作图(保留作图痕迹,不写作法),作
的角平分线交
于点
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(2)F为CD中点,连接
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的数量关系及位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(2)F为CD中点,连接
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解答题-作图题
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【推荐2】如图,在平行四边形
中,已知
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(1)实践与操作:作
的平分线交
于点
,在
上截取
,连接
;(要求:尺规作图,保留作图痕迹,不写作法)
(2)猜想并证明:猜想四边形
的形状,并给予证明.
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(2)猜想并证明:猜想四边形
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解答题-证明题
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【推荐1】已知:如图,点
、
在平行四边形
的边
上,
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解答题-证明题
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【推荐2】如图,在□ABCD中,点E、F分别在边CD、AB上,且满足CE=AF.
(1)求证:△ADE≌△CBF;
(2)连接AC,若AC恰好平分∠EAF,试判断四边形AECF为何种特殊的四边形?并说明理由.
(1)求证:△ADE≌△CBF;
(2)连接AC,若AC恰好平分∠EAF,试判断四边形AECF为何种特殊的四边形?并说明理由.
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