如图,已知
,求作菱形
,使
为菱形的对角线.点E在
上.小刚的作法:
①分别以点A,B为圆心,大于
的长为半径作弧,两弧分别交于点F,G,作直线
,分别交
于点O,E.
②以点A为圆心,
的长为半径作弧,交
于点D,连接
,则四边形
为所求作的菱形.
证明:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945e93c9f3515ded840de09a9ba81ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①分别以点A,B为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
②以点A为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427ffb0027784bd4fc04d8e4952d46c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945e93c9f3515ded840de09a9ba81ce8.png)
证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945e93c9f3515ded840de09a9ba81ce8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/bd7b85ab-b67f-4723-a765-414b1cd1f0fd.png?resizew=186)
更新时间:2023-04-22 12:09:25
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【推荐1】(1)如图,已知平面上有三个点A,B,C,请按要求画图.
,射线
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(2)用适当的数学语言表述下面的图形:
②___________________________________________________________________
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②延长
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(2)用适当的数学语言表述下面的图形:
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解答题-作图题
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【推荐2】如图,已知线段
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【推荐2】如图,在
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证明:∵
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(2)求证:
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证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bde0d7cc26695cc9198caa516bf450.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2779662cf36bab7e33534c1ace192281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7572ecc467c061ef71cf4486ec63ec3e.png)
∵
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解答题-证明题
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【推荐1】已知:如图,在
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,
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/eba6b342-a7b6-4fc7-a087-c7bfdc55160e.png?resizew=132)
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解答题-作图题
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【推荐2】如图,在由边长为1个单位长度的中小正方形组成的12×12的网格中,给出了以格点(网格线的交点)为端点的线段AB.
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(1)在图1中以线段AB为一边,作一个菱形ABCD,且点C、D也为格点.(画出一个即可)
(2)在图2中使用无刻度的直尺,作出线段AB的垂直平分线,并保留必要的作图痕迹.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/25a1a0e5-b30c-4847-98ca-3a32b36853a9.png?resizew=184)
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