满分5 >
初中数学试题 >
如图,⊙O过点B、C.圆心O在等腰直角△ABC的内部,∠BAC=90°,OA=1...
如图,⊙O过点B、C.圆心O在等腰直角△ABC的内部,∠BAC=90°,OA=1,BC=6,则⊙O的半径为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041007_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041007_ST/0.png)
B.2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041007_ST/1.png)
C.3
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041007_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041007_ST/3.png)
考点分析:
相关试题推荐
在下列四个图案中,既是轴对称图形,又是中心对称图形是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041006_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041006_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041006_ST/images2.png)
D.
查看答案
2011年,全国城镇新增就业人数为1221万人,用科学记数法表示1221万正确的是( )
A.1.221×10
8B.1.221×10
7C.12.21×10
6D.12.21×10
5
查看答案
如图,正五边形FGHMN是由正五边形ABCDE经过位似变换得到的,若AB:FG=2:3,则下列结论正确的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857252704125/SYS201311011938572527041004_ST/images0.png)
A.2DE=3MN
B.3DE=2MN
C.3∠A=2∠F
D.2∠A=3∠F
查看答案
下列计算正确的是( )
A.(a
3)
2=a
5B.a
2+a=a
3C.a
3÷a=a
3D.a
2•a
3=a
5
查看答案
下列数据:16,20,22,25,24,25的平均数和中位数分别为( )
A.21和22
B.22和23
C.22和24
D.21和23
查看答案