若一个多边形的内角和等于720°,则这个多边形是 边形.
考点分析:
相关试题推荐
为了响应学校读书节活动,某班同学捐赠书籍数量统计:
书类 | A | B | C | D | E |
册数(册) | 10 | 10 | 15 | 20 | 25 |
学生数(人) | 8 | 2 | 13 | 7 | 10 |
在这次捐书活动中,该班学生捐书册数的众数是
.
查看答案
已知点(m,1)在反比例函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663013_ST/0.png)
,则m的值为
.
查看答案
如图,△DEF的边长分别为1,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663011_ST/0.png)
,2,正六边形网格是由24个边长为2的正三角形组成,以这些正三角形的顶点为顶点画△ABC,使得△ABC∽△DEF.如果相似比
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663011_ST/1.png)
=k,那么k的不同的值共有( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663011_ST/images2.png)
A.1个
B.2个
C.3个
D.4个
查看答案
已知函数y=x-5,令x=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/0.png)
,1,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/1.png)
,2,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/2.png)
,3,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/3.png)
,4,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/4.png)
,5,可得函数图象上的十个点.在这十个点中随机取两个点P(x
1,y
1),Q(x
2,y
2),则P,Q两点在同一反比例函数图象上的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/5.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/6.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190257881666302/SYS201311011902578816663010_ST/7.png)
D.
查看答案