满分5 >
初中数学试题 >
(2003•甘肃)如图,⊙O1和⊙O2相交于点A、B,且⊙O2的圆心O2在圆⊙O...
(2003•甘肃)如图,⊙O
1和⊙O
2相交于点A、B,且⊙O
2的圆心O
2在圆⊙O
1的圆上,P是⊙O
2上一点,已知∠AO
1B=60°,那么∠APB的度数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853007_ST/images0.png)
A.60°
B.65°
C.70°
D.75°
考点分析:
相关试题推荐
(2003•桂林)中华人民共和国国旗上的五角星的画法通常是先把圆周五等分,然后连接五等分点而得(如图),五角星的每一个角的度数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853006_ST/images0.png)
A.30°
B.35°
C.36°
D.37°
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853005_ST/images0.png)
(2003•淮安)如图,已知圆心角∠AOB=100°,则圆周角∠ACB的度数为( )
A.100°
B.80°
C.50°
D.40°
查看答案
(2003•吉林)用直角钢尺检查某一工件是否恰好是半圆环形工件,根据图形所表示的情形,四个工件中哪一个肯定是半圆环形( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853004_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853004_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853004_ST/images2.png)
D.
查看答案
(2003•荆州)如图OA、OB、OC都是圆O的半径,∠AOB=2∠BOC.若∠BAC=30°,则∠ACB的度数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853003_ST/images0.png)
A.60°
B.45°
C.75°
D.40°
查看答案
(2002•泸州)如图,在⊙O中,圆心角∠AOB=48°,则圆周角∠ACB的度数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232416290285382/SYS201310212324162902853002_ST/images0.png)
A.48°
B.24°
C.36°
D.96°
查看答案