如图
,
是两条笔直的公路,点
是
上的一个超市,现在想建一个服务区
,要求到两条公路的距离相等,且服务区到超市
的距离最近,求作这个服务区.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/3/10/2416458901078016/2416606465646592/STEM/2446e03867e542cb9f62837ceb81ccb4.png?resizew=198)
更新时间:2020-03-10 17:01:21
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【推荐1】如图,在△ABC和△ADE中,AB=AC, DE=DA,D为AB中点,DE
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解答题-作图题
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名校
【推荐2】如图,四边形
是平行四边形.
上取点E,使
,连接
,作
的平分线交
于F;(保留作图痕迹,不写作法)
(2)根据(1)中作图,求证:
,补充完成下列证明过程(答案填写在答题对应标号位置).
证明:∵
平分
,∴
______,
∵四边形
是平行四边形,∴
,
,
∴
______,
∴
,∴
______,
∵
,∴
,
∵
,∴
______,
∵
,∴四边形
为______,∴
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(2)根据(1)中作图,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
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∵四边形
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∴
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∴
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∵
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∵
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∵
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【推荐2】如图,已知
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