如图,在△ ABC 中, AB =5, BC =3, AC =4,动点 E (与点 A , C 不重合)在 AC 边上, EF ∥ AB 交 BC 于 F 点.
![](https://img.xkw.com/dksih/QBM/2015/3/21/1578613585166336/1578613585723392/STEM/e1440e881c934396a6e81862ed0d5be7.png?resizew=131)
(1)当△ ECF 的面积与四边形 EABF 的面积相等时,求 CE 的长;
(2)当△ ECF 的周长与四边形 EABF 的周长相等时,求 CE 的长;
(3)试问在 AB 上是否存在点 P ,使得△ EFP 为等腰直角三角形?若不存在,请简要说明理由;若存在,请求出 EF 的长.
![](https://img.xkw.com/dksih/QBM/2015/3/21/1578613585166336/1578613585723392/STEM/e1440e881c934396a6e81862ed0d5be7.png?resizew=131)
(1)当△ ECF 的面积与四边形 EABF 的面积相等时,求 CE 的长;
(2)当△ ECF 的周长与四边形 EABF 的周长相等时,求 CE 的长;
(3)试问在 AB 上是否存在点 P ,使得△ EFP 为等腰直角三角形?若不存在,请简要说明理由;若存在,请求出 EF 的长.
更新时间:2016-12-12 18:00:28
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【知识点】 相似三角形的判定与性质综合
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【推荐2】如图,
是
的直径,点
是
上异于
、
的一点,点
是
角平分线上一点,连接
、
,其中
交
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,交
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(1)求证:直线
是
的切线;
(2)若点
是
的中点,求
的值;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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(1)求证:直线
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(3)若
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