题目
题型:不详难度:来源:
如图,在梯形ABCD中,AB//DC,AB=aCD=b(a>b)。若EF//AB,EF到CD与AB的距离之比为m:n,则可推算出:,
用类比的方法,推想出下列问题的结果,在上面的梯形ABCD中,延长梯形的两腰AD和BC交于O点,设△OAB,△OCD的面积分别
为S1,S2,EF//AB,且EF到CD与AB的距离之比为m:n,则△OEF的面积S0与S1:S2的关系是( )
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231108-99038.jpg)
A
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231109-92963.gif)
B
C
D
答案
核心考点
试题【如图,在梯形ABCD中,AB//DC,AB=aCD=b(a>b)。若EF//AB,EF到CD与AB的距离之比为m:n,则可推算出:,用类比的方法,推想出下】;主要考察你对相似三角形的判定及有关性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231101-10123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231101-10742.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231102-67930.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231102-73541.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231102-41560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231102-23170.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231102-54005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231103-75698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231103-87782.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231057-11097.jpg)
在平面四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231050-39884.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231050-24883.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231050-22927.gif)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231050-89118.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191107/20191107231050-36401.jpg)