题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-14245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-20758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-18618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-98883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-53502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235020-43177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235020-52457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235020-78104.png)
(1)在
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235020-93393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235020-38668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-89894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-20758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-74085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-64918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-85642.png)
(2)如图二,若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-74171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-77871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-80923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235019-18618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-74171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-64918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-54283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-52028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-77871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-13051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-89894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-67267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-67267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-74171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-50707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-62630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-95741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-41113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-54283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-54283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-41113.png)
(3)在(2)的条件下,当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235021-54283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-25849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235022-67267.png)
答案
(1)依题意:Rt
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-52366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-71803.png)
在Rt
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-71803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-32377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-91956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-76048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-43135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-10575.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235024-74932.png)
在Rt
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235024-10328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235024-54077.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235024-18110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235025-52785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235025-32181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235025-11503.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235025-81454.png)
(2)如图(1)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235026-22076.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235026-75589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235023-71803.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235026-46372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235027-97719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235027-49760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235027-24243.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235028-78643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235028-94044.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235028-66272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235028-81694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235029-61311.png)
∴ 四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235029-16979.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235029-44325.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235029-57053.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235029-48093.png)
∴ 当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235030-60174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235030-99419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235030-19896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235030-82551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235031-91375.png)
解析
核心考点
试题【(14分)如图一,是一张放在平面直角坐标系中的矩形纸片,为原点,点在轴的正半轴上,点在轴的正半轴上,,.(1)在边上取一点,将纸片沿翻折,使点落在边上的点处,求】;主要考察你对相似图形等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234958-91763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234958-35416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234959-90626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234959-31395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234959-59901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234959-41562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235000-23889.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234958-35416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102235000-28573.png)
A.![]() | B.![]() | C.![]() | D.![]() |
A.36cm2 | B.85 cm2 | C.96 cm2 | D.100 cm2 |
A.2 cm2 | B.4 cm2 | C.8 cm2 | D.16 cm2 |
A.△AED∽△ACB | B.△AEB∽△ACD |
C.△BAE∽△ACE | D.△AEC∽△DAC |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102234946-19695.jpg)
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