题型:单选题
难度:0.65
引用次数:137
题号:12085686
如图,AD平分∠BAC,AB=AC,连接BD,CD并延长,分别交AC,AB于点F,E,则图中全等三角形共有( )
![](https://img.xkw.com/dksih/QBM/2020/12/17/2616130188345344/2623412554129408/STEM/941e9bcac5f84881b6f2f68236ea06af.png?resizew=84)
![](https://img.xkw.com/dksih/QBM/2020/12/17/2616130188345344/2623412554129408/STEM/941e9bcac5f84881b6f2f68236ea06af.png?resizew=84)
A.2对 | B.3对 | C.4对 | D.5对 |
更新时间:2020-12-27 21:29:24
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【推荐1】如图,OA=OC,OB=OD且OA⊥OB,OC⊥OD,下列结论:①△AOD≌△COB;②CD=AB;③∠CDA=∠ABC; 其中正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/cb379099-ad86-4235-b63e-69a749e88529.png?resizew=147)
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A.①② | B.①②③ | C.①③ | D.②③ |
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【推荐2】已知锐角
,如图,(1)在射线
上取点
,
,分别以点
为圆心,
,
长为半径作弧,交射线
于点
,
;(2)连接
,
交于点
.根据以上作图过程及所作图形,下列结论错误 的是( )
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733505572282368/2740965654634496/STEM/0b93d30d-166b-4bf2-bb5d-7eb231f905aa.png?resizew=198)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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A.![]() | B.![]() |
C.若![]() ![]() | D.点![]() ![]() |
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【推荐1】下列命题:①两边分别相等的两个直角三角形全等;②一个锐角和一条边分别相等的直角三角形全等;③斜边及一锐角分别相等的两个直角三角形全等;④斜边和一条直角边分别相等的两个直角三角形全等;⑤一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.其中是真命题的有( )
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,已知AB=AD,BC=DC,则图中全等三角形的对数是( )
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101713643347968/2103895889018880/STEM/fca61681430c4378be519fd8221cd40d.png?resizew=161)
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101713643347968/2103895889018880/STEM/fca61681430c4378be519fd8221cd40d.png?resizew=161)
A.3 |
B.2 |
C.1 |
D.0 |
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