如图,
的对角线
、
相交于点
,点
、
分别为
、
上的点,且
,连接
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d1125b47dec1c5e93143ee59ad862a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42c17fe4d91d67c1fa43f966bffd891.png)
更新时间:2024-05-19 14:15:54
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【推荐1】随着互联网的发展,网上购物几乎成为了人们日常生活中不可或缺的一部分,这也使得快递行业市场规模呈现出爆发式的增长.为了方便居民领取快递,小明的爸爸计划在一条笔直的公路l旁设一个菜鸟驿站点P,使驿站到公路同侧的A、B两个小区的距离相等.
, B小区到公路l的距离
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(2)如图2,若A、B 两个小区到公路l的距离均为a,
的长度为
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(3)爱动脑的小明通过推理发现:当A小区到公路l的距离a与B小区到公路l的距离b之和等于
的长度时,
始终是直角. 请利用图3加以说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab963521cc81c0d659d783f8e5eacc6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb48600a363056983ba4a07e5f5bf166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa41693590280ed5c3b76199f5eb5ef.png)
(2)如图2,若A、B 两个小区到公路l的距离均为a,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da971671378e8d40e15f5ef0b6e41467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(3)爱动脑的小明通过推理发现:当A小区到公路l的距离a与B小区到公路l的距离b之和等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540b05ed65a4dc86d84e6fe4ec6f6e5e.png)
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【推荐2】(1)计算:
;
(2)已知,如图,D是△ABC的边AB上一点,AB∥FC,DF交AC于点E,DE=EF.求证:AE=CE.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff2183e1108539951f03a06849a1e22.png)
(2)已知,如图,D是△ABC的边AB上一点,AB∥FC,DF交AC于点E,DE=EF.求证:AE=CE.
![](https://img.xkw.com/dksih/QBM/2017/5/23/1693260461047808/1699084827467776/STEM/22070b674f0f416f89a30680ef0ca707.png?resizew=135)
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【推荐1】如图,以□ABCD的顶点A为圆心,AB为半径作⊙A,分别交
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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【推荐2】如图,平行四边形ABCD的对角线交于点O,且AB=13,AC=24,BD=10.求证:四边形ABCD是菱形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/c685bf9c-34e9-4b96-8d1d-5afca2621bfa.png?resizew=182)
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