题目
题型:不详难度:来源:
如图,在
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-89630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-55029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-84327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-39309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-72165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-56739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-41575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-84327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-41575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-71707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-22043.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-22318.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-63425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-30760.png)
小题1:(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-90545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-92714.png)
小题2:(2)联结
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-79567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-79567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-71769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-52743.png)
小题3:(3)过点
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-39650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-98941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-19733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-64589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-65316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-89976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-92714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-85542.png)
答案
小题1:(1)在Rt△ABC中,
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-55029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-81480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-72165.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-22622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-76234.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-84327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001225-39309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-70185.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-52591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-95713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-65441.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-42222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-50742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-49768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-71531.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-22908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-92714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-96508.png)
小题2:(2)过点
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-39650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-13107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-84615.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-79567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-71769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-18551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001226-22318.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-25425.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-48041.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-39312.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001230-15971.png)
小题3:(3)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001231-40755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001231-18880.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001231-77740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-50742.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-65316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001228-89976.png)
可得
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001227-65316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001229-50742.png)
分两种情况:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001231-83499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001231-48530.png)
在Rt△FBE中,
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-76682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-93233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-13119.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-41999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-83209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001233-88662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001233-23479.png)
在Rt△FBE中,
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-76682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-93233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001232-13119.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001233-95832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001233-64896.png)
综合
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001231-83499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001233-88662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001233-64896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001234-83665.png)
解析
核心考点
试题【(本题满分14分)如图,在中,,是斜边上的中线,,,点是延长线上的一动点,过点作,交延长线于点,设.小题1:(1)求关于的函数关系式及定义域;(4分)小题2:(】;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/20191103/20191103001215-95993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001205-20438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001205-74140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001206-91372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001206-50759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001206-24042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001206-59293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001206-82923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001207-99613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001207-68248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001207-17485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001207-52327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001208-70876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001208-95722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001208-10526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001209-33237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001209-88798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001209-91345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001209-87740.png)
小题1:(1)请画出小王在E处的影子EH;
小题2:(2)求EH的长. (8分)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001201-72064.jpg)
小题1:(1)请指出四边形ACED的形状,并证明;
小题2:(2)如果BD=8,AG=6,求△BDE的面积.(10分)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001157-20231.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001153-86242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001153-93191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103001154-19762.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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