如图,在每个小正方形的边长为1的网格中,
的顶点A在格点上,B是小正方形边的中点,
,
,经过点A,B的圆的圆心在边AC上.
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227599865618432/2227739467186176/STEM/404bad9bbdd448b8bab08f2fb17365e4.png?resizew=259)
(Ⅰ)线段AB的长等于_______________ ;
(Ⅱ)请用无刻度 的直尺,在如图所示的网格中,画出一个点P,使其满足
,并简要说明点P的位置是如何找到的(不要求证明)_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed498b8aab0dfed96bd7d540f55fc018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e88546f11937321e029234028e5955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbca02284e99cbecece1ebd463d58ed.png)
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227599865618432/2227739467186176/STEM/404bad9bbdd448b8bab08f2fb17365e4.png?resizew=259)
(Ⅰ)线段AB的长等于
(Ⅱ)请用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5598551437c9de74abc1198a5424557.png)
2019·天津·中考真题 查看更多[5]
天津市2019年中考数学2020年天津市东丽区九年级复学前复习指导数学试题(已下线)专题3.6 垂径定理(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(北师大版)天津市和平区第二十一中学2022--2023学年九年级上学期数学期末学情调研天津市第二十一中学2022-2023学年九年级上学期期末数学试卷
更新时间:2019-06-17 20:50:27
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【推荐2】如图,在
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【推荐2】如图,草坪边上有两条相互垂直的小路 m,n,垂足为 O,在草坪内有一个圆形花坛,花坛边缘上有A, B,C 三棵小树,为了估测圆形花坛的半径,在小路上 D,E,F 三点观测,发现均有两棵树与观测点在同一直线上,从观测点 E 沿着 ED 方向走 5 米到 G 点.测得∠BGD=45°,OF=18 米,∠AFO=90°,tan∠BDE=tan∠BED=
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