题目
题型:期末题难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027045219-99440.png)
答案
∵ AD ∥BC ,
∴∠A= ∠C .
在△ADF与△CBE中,
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027045220-91172.png)
∴△ADF ≌△CBE .
∴ AF=CE .
∴ AF-EF=CE-EF.
∴AE=CF.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027045207-15611.png)
(1)当t=4时,求S的值;
(2)当4≤t≤10时,求S与t的函数关系式,并求出S的最大值.
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027045207-38157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027045201-53692.png)
(2)如图①中的△MNK绕顶点M逆时针旋转45°,得到图②,此时重叠部分的面积为( )
(3)如果将△MNK绕顶点M旋转到不同于的位置图①、图②,如图③,猜想此时重叠部分的面积为多少?并试着加以验证.
![](http://img.shitiku.com.cn/uploads/allimg/20191027/20191027045156-72765.png)
B.①②③
C.②③④
D.①③
最新试题
- 1A person ________ email account is full won"t be able to se
- 2分解因式:(1)x2﹣4y2=( );(2)x2﹣10x+25=( ).
- 3三角方程2sin(π2-x)=1的解集为( )A.{x|x=2kπ+π3,k∈Z}B.{x|x=2kπ+5π3,k∈Z
- 4Swans are beautiful birds. You must like their beautiful fea
- 5由欧姆定律公式I=UR变形得R=UI,对此,下列说法中正确的是( )A.加在导体两端的电压越大,则导体的电阻越大B.通
- 6Is there _________on TV today?A. anything else importantB. i
- 7I was very tired last night,_____I went to bed earlier. [
- 8It will be many years ______the doctors and medical scientis
- 9根据下列人物归类标准,选出正确的一项是①阎立本②吴道子③赵孟頫[ ]A .①②B .①③C .②③D .①②③
- 10— You look tired, you should have a good rest for _______ da
热门考点
- 1 It’s five years _____ our teacher came to Jiangyan.A.sinceB
- 2 Han Han’s new book will ________ next month. A. come out
- 3经济学中著名的“丰收悖论”是这样表述的:(在完全竞争的市场上)如果某一农场主获得丰收,他的农场收入会增加;如果所有农场主
- 4向量化简后等于______________
- 5Each member country WTO must ___________ its laws and regula
- 6—_________riding our bikes to the park?—Good idea.A.How abou
- 7如图是三张形状、大小完全相同的网格图,网格图中的每个小正方形的边长均为1。请在三幅图中分别画出符合图下所述要求的图形,所
- 8The new cafe,the walls of________are painted light green,is
- 9如图,在长方形草地内修建了宽为2米的道路,则草地面积为( )A.140米2B.144米2C.148米2D.152米2
- 10阅读理解 Kataria is the founder of the worldwide laughter