如图,在△ABC中,∠C=90°,∠A=36°,DE是线段AB的垂直平分线,交AB于点D,交AC于点E,求∠EBC的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/818b9494-5aaf-4139-b074-7e9468e7a402.png?resizew=219)
更新时间:2016-12-05 07:10:09
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解答题-证明题
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适中
(0.65)
名校
【推荐1】如图,在
中,
,
,点D是线段
上任意一点,连接
,作
,
交线段
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/13949296-b546-4e44-88c2-a22f425360dd.png?resizew=167)
(1)若
,求
和
的度数;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9608cad892644b4094ed6438b69572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/13949296-b546-4e44-88c2-a22f425360dd.png?resizew=167)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66f960a3bcd33415c0541fe5778f9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5d3f1c7f7ffdf572978468d5a3adde.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aeb7d8bfd4877a9bd85b7cc69aec40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22cda279d3cd75eeb603b14a3b94e420.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图①,在
和
中,
,
,
,AC,BD相交于点P.
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828524875923456/2830417074339840/STEM/f1a6dece-fa3c-4cb4-840a-d4d88aa83818.png)
(1)求证:①
;
②
.
(2)如图②,在
和
中,
,
,
,
,
相交于点P,AC与BD间有怎样的数量关系?
的度数为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0785412ab2f3b729b9afbe47cf26e4b8.png)
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828524875923456/2830417074339840/STEM/f1a6dece-fa3c-4cb4-840a-d4d88aa83818.png)
(1)求证:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9678acfdc9d297cc2468beda9bf3ea2.png)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2fd69563c02e29e32d752f055336bb.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/cb686e4f5e3938575bc547e849d5513f.png)
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解答题-作图题
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适中
(0.65)
【推荐1】如图,
交于A点,P、Q的位置如图所示,试确定M点,使它到
的距离相等,且到P、Q两点的距离也相等。(用直尺和圆规作图,不需要具体的文字步骤,但要保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfac9d6efa6c946ec247afd91e83829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7667e3d7ee7c03a8e06999d1fd09585.png)
![](https://img.xkw.com/dksih/QBM/2019/12/19/2358475065303040/2359437107208193/STEM/4b0226ce22f04c059fe675e9f8b8b39e.png?resizew=181)
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解答题-证明题
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【推荐2】如图, AB、BC的垂直平分线交于点P,
(1)求证:PA= PC;
(2)连接AC,
①若∠ABC=150°,证明△PAC是等边三角形.
②若∠ABC= °,△PAC是等腰直角三角形.(直接填结果,不需要说明)
(1)求证:PA= PC;
(2)连接AC,
①若∠ABC=150°,证明△PAC是等边三角形.
②若∠ABC= °,△PAC是等腰直角三角形.(直接填结果,不需要说明)
![](https://img.xkw.com/dksih/QBM/2017/12/1/1829273545818112/1831358689886209/STEM/20febc8e00ad4909b858be90d1017d64.png?resizew=136)
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