如图,边长为4的正方形
中,顶点A落在矩形
的边
上,
,而矩形的顶点G恰好落在
边上.点O是
边上一动点(不与A,B重合),以O为圆心,
长为半径作圆,当
与矩形
的边相切时,
的长为 _____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
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2022九年级·浙江·专题练习 查看更多[4]
(已下线)第12讲 直线与圆的位置(4大考点)-2022-2023学年九年级数学考试满分全攻略(浙教版)浙教版九年级下册第二章直线与圆的位置关系单元测试数学试题30-点、直线与圆的有关位置关系2024年江苏省常州市正衡中学九年级数学新课结束模拟预测题
更新时间:2023-01-11 15:33:14
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【推荐1】如图,矩形
中,
,交
于E、F,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcbd9c92ffa4ff78dd65c8d99fb7020.png)
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【推荐2】如图,点O是矩形ABCD的对角线的交点,AB=15,BC=8,直线EF经过点O,分别与边CD,AB相交于点E,F(其中0<DE<
).现将四边形ADEF沿直线EF折叠得到四边形A′D′EF,点A,D的对应点分别为A′,D′,过D′作D′G⊥CD于点G,则线段D′G的长的最大值是_____ ,此时折痕EF的长为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7163395f9aaa29be7f6b3106ba48b744.png)
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【推荐1】已知边长为3的正方形
中,点E为
上一点,
,M为
中点,过M作直线分别与
、
相交于P、Q,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】如图,在正方形
中,点
、
为边
和
上的动点(不含端点),
,下列四个结论:①当
时,则
;②
;③
的周长不变;④若
,
,则
的面积为9.其中正确结论的序号是___________ .
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【推荐1】如图,
是
的内切圆,切点分别为点
、
、
,设
的面积、周长分别为
、
,
的半径为
,则下列等式:①
;②
;③
;④
,其中成立的是______ (填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图,在等腰直角三角形
中,
,点O为线段
的中点,
沿着直线
翻折后得到
,线段
与线段
交于点N,若线段
的长为2,则线段
的长度为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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【推荐2】如图,在
中,
,
,点
、
是边
的三等分点,点
是
上的动点,当
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