如图,将边长为6的正六边形
沿
折叠,点
恰好落在边
的中点上,延长
交
于点
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/da108ab0-7ece-4838-8b0c-00698503f856.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/da108ab0-7ece-4838-8b0c-00698503f856.png?resizew=163)
A.1 | B.1.2 | C.1.5 | D.1.8 |
20-21九年级下·江苏无锡·阶段练习 查看更多[2]
更新时间:2023-01-08 13:40:28
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【推荐1】如图,矩形纸片
中,
,
,点E、G分别在
上,将
、
分别沿
翻折,翻折后点C与点F重合,点B与点P重合.当A、P、F、E四点在同一直线上时,线段
长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdba2ac1a72eea482f5578843e00357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20227c155003de7163d407daf0a5e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0888b3b3b6784b6c8baf9901b77692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5634a208294350f8ec151cd19b6d3278.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图所示,在长方形ABCD中,AB=2
,在线段BC上取一点E,连接AE、ED,将
ABE沿AE翻折,点B落在点
处,线段E
交AD于点F.将
ECD沿DE翻折,点C的对应
恰好落在线段
上,且点
为
的中点,则线段EF的长为( )
![](https://img.xkw.com/dksih/QBM/2022/3/10/2933056282050560/2935913344319488/STEM/bc3d97bb-5a0c-4f71-b559-e359bd106722.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
![](https://img.xkw.com/dksih/QBM/2022/3/10/2933056282050560/2935913344319488/STEM/bc3d97bb-5a0c-4f71-b559-e359bd106722.png?resizew=175)
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【推荐1】已知四个正六边形如图摆放在图中,顶点A,B,C,D,E,F在圆上.若两个大正六边形的边长均为2,则小正六边形的边长是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图1,已知正方形MNOK和正六边形ABCDEF边长均为1,把正方形放在正六边形中,使OK边与AB边重合,如图所示,按下列步骤操作,将正方形在正六边形中绕点B顺时针旋转,使KM边与BC边重合,完成第一次旋转,再绕点C顺时针旋转,使MN边与CD边重合,完成第二次旋转;…,如图2,是六次旋转的位置图象,图中虚线是点M的运动轨迹,则在第四次旋转的过程中,点B,M间的距离可能是( )
![](https://img.xkw.com/dksih/QBM/2018/4/16/1925577788760064/1926797833199616/STEM/cb2a4979d811447e928f5e3968a227b0.png?resizew=280)
![](https://img.xkw.com/dksih/QBM/2018/4/16/1925577788760064/1926797833199616/STEM/cb2a4979d811447e928f5e3968a227b0.png?resizew=280)
A.1.4 | B.1.1 | C.0.8 | D.0.6 |
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【推荐1】如图,矩形
中,
,对角线相交于
,过
点作
交
于
点,
为
中点,连接
交
于
点,交
的延长线于
点,下列
个结论:
;
;
≌
;
;
.正确的有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cce74b9403717809c7867d30eac31d.png)
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【推荐2】如图,△ABD内接于圆O,∠BAD=60°,AC为圆O的直径.AC交BD于P点且PB=2,PD=4,则AD的长为( )
![](https://img.xkw.com/dksih/QBM/2018/11/29/2086057862479872/2086852526948352/STEM/a381db55f3e84e6387bebbe037200916.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2018/11/29/2086057862479872/2086852526948352/STEM/a381db55f3e84e6387bebbe037200916.png?resizew=101)
A.2![]() | B.2![]() | C.2![]() | D.4 |
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【推荐1】在矩形
中,
为
的中点,一块足够大的三角板的直角顶点与点
重合,将三角板绕点
旋转,三角板的两直角边分别交
或它们的延长线)于点
,设
,下列四个结论:①
;②
; ③
;④
,正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483993948086272/2490821542977536/STEM/5c22c67d245a4b469e227ffc0389f0fd.png?resizew=237)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7d04813c84f2fbfcd16462903cc9e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9c30fa03502125c0c7f8b9b3e3f124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd86e0265f72c92941bda52032aa281.png)
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![](https://img.xkw.com/dksih/QBM/2020/6/13/2483993948086272/2490821542977536/STEM/5c22c67d245a4b469e227ffc0389f0fd.png?resizew=237)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在正方形
中,
,
是
的中点,在
延长线上取点
使
,过点
作
交
于点
,交
于点
,交
于点
,以下结论中:①
;②
;③
;④
.正确的个数是
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d3d4307b9f64d8c99f864941f37874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2819babeef6f79d9bd34e6fe13c94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545ab3d89fdef2fde7eacef6e4094b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9544f37541cb2018b24d0c05c5c96c.png)
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( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/68de9201-457c-49fe-8590-6865bad394b9.png?resizew=167)
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