题目
题型:安徽省期末题难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070539-89557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070539-62562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070540-56274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070540-73384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070540-51811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070540-17428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070541-20787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070541-17443.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070541-30228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070541-73154.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070541-54214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070542-14302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070542-78230.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070542-77505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070542-93214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070543-75126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070543-68617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070543-71913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070543-18082.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070544-29710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070544-84313.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070544-99061.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070544-58312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070545-23313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070545-82660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070545-77451.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070545-80060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070546-99250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070546-40842.png)
(2)过
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070546-12523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070546-17308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070547-30400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070547-65086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070547-63583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070547-93784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070547-16897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070548-71011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070548-14571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070548-24340.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070548-91240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070549-77726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070549-68554.png)
(3)由题意知:
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070549-95543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070549-55957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070550-46060.png)
为直角梯形 即
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070550-88757.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070551-31083.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070552-14678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070552-60671.png)
核心考点
试题【如图,在直角梯形中,,动点从开始沿边向以的速度运动;动点从点开始沿边向以的速度运动。、分别从点、C同时出发,当其中一点到达端点时,另外一点也随之停止运动,设运动】;主要考察你对平行四边形判定等知识点的理解。[详细]
举一反三
(1)求证:AE=ED;
(2)若AB=BC,求∠CAF的度数。
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070535-37126.png)
(1)四边形BCEF是平行四边形吗?说说你的理由。
(2)当∠A等于多少时,四边形BCEF是菱形,并说出你的理由。
(3)四边形BCEF可以是正方形吗?为什么?
![](http://img.shitiku.com.cn/uploads/allimg/20191030/20191030070517-37757.png)
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