如图,在△ABC中,∠C=90°,∠CAB=60°,
(1)作AB边上的中垂线交BC边于点E,交AB边于点D(保留作图痕迹,不写作法和证明)
(2)连接AE,若CE=4,求AE的长
(1)作AB边上的中垂线交BC边于点E,交AB边于点D(保留作图痕迹,不写作法和证明)
(2)连接AE,若CE=4,求AE的长
![](https://img.xkw.com/dksih/QBM/2019/4/15/2183021004775424/2183937777156097/STEM/aa22ea70a512482685dc08a86788370e.png?resizew=163)
更新时间:2019-04-16 23:35:41
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【推荐1】如图,在△ABC中,AB=AC,AF⊥BC,在△CDE中,DC=DE,DG⊥CE,AF和DG的延长线交于点P,连接BP、EP.
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【推荐2】如图,在
中,
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的垂直平分线
交
于点E,D.
(1)若
的周长为23,求
的长;
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【推荐1】阅读材料:如果一个三角形的三边长分别为a,b,c,记,那么这个三角形的面积
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解答题-作图题
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【推荐2】如图,
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点
到
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(2)在(
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后,写出
的长.
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【推荐1】如图,在等边△ABC中, M为BC边上的中点, D是射线AM上的一个动点,以CD为一边且在CD的下方作等边△CDE,连接BE.
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(1)填空:若D与M重合时(如图1)∠CBE= 度;
(2)如图2,当点D在线段AM上时(点D不与A、M重合),请判断(1)中结论是否成立?并说明理由;
(3)在(2)的条件下,如图3,若点P、Q在BE的延长线上,且CP=CQ=4,AB=6,试求PQ的长.
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(3)在(2)的条件下,如图3,若点P、Q在BE的延长线上,且CP=CQ=4,AB=6,试求PQ的长.
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【推荐2】如图,△ABC中,AB=AC,AD⊥AC交BC于点D,且∠CDA=60°,BD=2,求BC的长.
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