如图,在梯形ABCD中,AD∥BC,∠B=∠ACD.
![](https://img.xkw.com/dksih/QBM/2014/12/9/1573764540293120/1573764546355200/STEM/2b88f315d65f4f0f85859954d717ad3c.png)
(1)证明:△ABC∽△DCA;
(2)若AC=6,BC=9,求AD长.
![](https://img.xkw.com/dksih/QBM/2014/12/9/1573764540293120/1573764546355200/STEM/2b88f315d65f4f0f85859954d717ad3c.png)
(1)证明:△ABC∽△DCA;
(2)若AC=6,BC=9,求AD长.
11-12九年级上·福建泉州·期末 查看更多[4]
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更新时间:2016-12-05 21:35:04
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【知识点】 相似三角形的判定与性质综合
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在矩形
中,
平分
交
于点E,F在
边上,且
,垂足为点H,连接
.
(1)若
,求
的度数;
(2)求证:
;
(3)若F为
的中点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa1b5b6051d500fe6c6f1c19c7ee49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/48ce52d7-8588-470a-8819-cca607e4f548.png?resizew=170)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c9dcba5fd48e4b14ba53069105ef1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef41d15122f8108c3edb83b3b47f9e1.png)
(3)若F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686e5f5ad429cfc4f7f3f692cc9969a3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,点A、B、C、D在⊙O上,O点在∠D的内部,四边形OABC为平行四边形
(1)求∠D的度数;
(2)E、F分别是AB、BC上的两点,且AE=CF,延长OE、CB交于点G,求证:∠COF=∠CGO
(3)在第(2)小题的条件下,连接AC,交OE于点H,若OC=2,CF=1,求OH∶EH∶EG的值.
(1)求∠D的度数;
(2)E、F分别是AB、BC上的两点,且AE=CF,延长OE、CB交于点G,求证:∠COF=∠CGO
(3)在第(2)小题的条件下,连接AC,交OE于点H,若OC=2,CF=1,求OH∶EH∶EG的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/5bb61fdd-c392-4caa-b69f-fb2818855e78.png?resizew=380)
您最近一年使用:0次