如图是由小正方形组成的9×7网格,每个小正方形的顶点叫做格点,A,B,C三个格点都在圆上.仅用无刻度的直尺在给定网格中完成画图,画图过程用虚线表示.
(1)画出该圆的圆心O,并画出劣弧
的中点D;
(2)画出格点E,使EA为⊙O的一条切线,并画出过点E的另一条切线EF,切点为F.
(1)画出该圆的圆心O,并画出劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
(2)画出格点E,使EA为⊙O的一条切线,并画出过点E的另一条切线EF,切点为F.
更新时间:2022-01-13 21:09:55
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【推荐2】如图,
中,
,其中
,
,
,
为
的角平分线,过点D作
交线段
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/98dd1a67-246d-44ee-b6dd-0a1d771b21b7.png?resizew=191)
(1)求证:
;
(2)
的周长为______;
(3)若点M在线段
上,点N在线段
上,求
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(1)求证:
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(2)
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(3)若点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐1】如图,正方形网格中每个小正方形方格的边长都为1,且点A,
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是直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐2】如图,在正方形网格上有一个
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(1)作
关于直线
的轴对称图形;
(2)设网格上的最小正方形边长为1.
①求
的面积;
②求
的EF边上的高线长.
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(1)作
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(2)设网格上的最小正方形边长为1.
①求
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②求
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【推荐1】如图所示,已知
的边AB是
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【推荐2】如图,
为
的直径,点C在
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