作图题:用直尺与圆规作图,保留作图痕迹,不写作法.
![](https://img.xkw.com/dksih/QBM/2016/3/7/1573981333659648/1573981340090368/STEM/3d9a755f6b594a8191b5d41542440e6a.png)
(1)如图1,在直线a上找一个点P,使PA=PB.
(2)如图2,在直线a上找一点M,使得M到边AB和AC的距离相等.
![](https://img.xkw.com/dksih/QBM/2016/3/7/1573981333659648/1573981340090368/STEM/3d9a755f6b594a8191b5d41542440e6a.png)
(1)如图1,在直线a上找一个点P,使PA=PB.
(2)如图2,在直线a上找一点M,使得M到边AB和AC的距离相等.
更新时间:2016-12-06 04:56:08
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解答题-作图题
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【推荐1】(1)如图1,在所给网格图(每小格均为边长是1的正方形)中完成下列各题:
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①画出
关于直线l对称的
;
②在直线l上找一点P,使
最小.
(2)如图2:已知
和C、D两点,用直尺和圆规求作一点P,使
,且点P到
两边的距离相等.(不写作法,保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/80f1fc9b-3b71-45fa-86df-60d710c825fb.png?resizew=482)
①画出
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②在直线l上找一点P,使
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(2)如图2:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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解答题-作图题
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【推荐2】如图,已知△ABC中,∠B=2∠A,点D在边AC上,且CD=CB.
(1)用尺规作图:在AB边上求作一点P ,使点P到CA,CB距离相等(保留作图痕迹,不要求写作法);
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(2)在(1)中, 线段BP与AD是否相等?说明理由.
(1)用尺规作图:在AB边上求作一点P ,使点P到CA,CB距离相等(保留作图痕迹,不要求写作法);
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(2)在(1)中, 线段BP与AD是否相等?说明理由.
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解答题-作图题
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【推荐1】如图,已知▱ABCD,点E在BC上,点F在AD上.
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解答题-作图题
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【推荐2】如图,Rt
ABC中,∠C=90°,∠A=30°.
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(1)作线段AB的对称轴DE,交AB于点E,交AC于点D.(要求用尺规作图,保留作图痕迹,不必写作法)
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解答题-证明题
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【推荐1】如图,
,
为
的中点,点
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的延长线交射线
于点
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(1)求证:
;
(2)当
时,求
的度数;
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的三边垂直平分线的交点在该三角形的内部,直接写出
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(1)求证:
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(2)当
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(3)若
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解答题-证明题
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【推荐2】如图,在
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解答题-作图题
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【推荐1】如图,三角形
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(3)过点A作线段
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解答题-证明题
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【推荐2】求证:一条直角边相等且另一条直角边上的中线相等的两个直角三角形全等.
要求:根据给出的
和
△
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/22/696bc440-5087-41b0-8d35-8809e3c132e4.png?resizew=290)
(1)在此图形上用尺规作出
与
边上的中线,不写作法,保留作图痕迹;
(2)请写出证明过程.
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/22/696bc440-5087-41b0-8d35-8809e3c132e4.png?resizew=290)
(1)在此图形上用尺规作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85c632e08ce1b355808bc7a9ad9a051.png)
(2)请写出证明过程.
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