2024九年级下·黑龙江哈尔滨·专题练习
1 . 如图,在正方形
中,O为对角线
的中点,E为正方形内一点,连接
,
,连接
并延长,与∠ABE的平分线交于点F,连接
,若
,则
的长度为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
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2024九年级下·全国·专题练习
2 . 如图,正方形
的边长为
,点
分别在
、
上,且
,
与
相交于点
,连接
,则
的最小值为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
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2024九年级下·全国·专题练习
3 . 如图,在菱形
中,
,
,点E,F分别在
,
上,且
,连接
,
,则
的最小值为________ .
![](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/7e918b70b02a73685e3c536c7f380e2c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422d1b4b63793aa39066cfcd1a70a929.png)
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4 . 如图,在
中,
,
,
,
是
边上一个动点,连接
,将线段
绕点
顺时针旋转
得到线段
,连接
,则线段
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
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5 . 如图,在正方形
中,
,点
分别是
边上的动点,且
,连接
交于点
.
时,连接
,取
的中点
,则
的长为_______ .
(2)点
之间的距离的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5141e0c913ff7ea7787d48f7c1d984.png)
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(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a515001be2cf972fce18a68bdb552609.png)
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名校
6 . 如图,已知点
、
,点
在
轴上运动.将
绕
顺时针旋转45°得到
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c53a3db1c5e56df936174633faae92.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2024-06-11更新
|
187次组卷
|
2卷引用:2024年江苏省苏州高新区实验初级中学九年级数学中考二模试题
7 . 如图,
中,
,
,
,点
在
上,延长
至点
,使
,
是
的中点,连接
,则
的长是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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8 . 如图,两个边长为2的等边三角形
和
拼接成菱形
,点
分别是边
上一动点(不与
重合),且满足
,则
的形状为_____________ ,
面积的最小值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
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9 . 如图,在
中,点E为
的中点,点D在
的延长线上,且
,连接
、
,延长
交
于点F,若
,则
的长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2024-06-10更新
|
220次组卷
|
2卷引用:2024年湖北省襄阳市襄城区中考模拟数学试题
10 . 如图,已知
,
,
,点
,
分别是
边上的动点,满足
.连接
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11f1def75efe786a86157290f10003e.png)
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