满分5 >
初中数学试题 >
如图AB、AC是⊙O的两条弦,∠A=30°,过点C的切线与OB的延长线交于点D,...
如图AB、AC是⊙O的两条弦,∠A=30°,过点C的切线与OB的延长线交于点D,则∠D的度数为
度.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161124850686406/SYS201310221611248506864014_ST/images0.png)
考点分析:
相关试题推荐
如图,直线a∥b,点B在直线b上,AB⊥BC,若∠2=55°,则∠1=
度.
查看答案
在数轴上,点A与点B对应的数分别为
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161124850686406/SYS201310221611248506864011_ST/0.png)
、
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161124850686406/SYS201310221611248506864011_ST/1.png)
,则点A与B之间的整数点对应的数是
.
查看答案
如图,在矩形ABCD中,AB=4,BC=6,当直角三角板MPN的直角顶点P在BC边上移动时,直角边MP始终经过点A,设直角三角板的另一直角边PN与边CD相交于点Q.则CQ的最大值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161124850686406/SYS201310221611248506864009_ST/images0.png)
A.4
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161124850686406/SYS201310221611248506864009_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161124850686406/SYS201310221611248506864009_ST/1.png)
D.
查看答案