如图,D、E分别是⊙O的半径OA、OB的中点,点C是
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001308953583632/SYS201311030013089535836006_ST/0.png)
的中点.
求证:CD=CE.
考点分析:
相关试题推荐
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001308953583632/SYS201311030013089535836005_ST/images0.png)
如图,A、B、C是⊙O上的三点,∠AOC=100°,则∠ABC的度数为( )
A.30°
B.45°
C.50°
D.60°
查看答案
如图,⊙O中,弦AB、CD相交于点P,∠A=40°,∠APD=75°,则∠B=( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001308953583632/SYS201311030013089535836004_ST/images0.png)
A.15°
B.40°
C.75°
D.35°
查看答案
已知⊙O的直径CD=10cm,弦AB⊥CD,垂足为M,CM:MD=4:1,则弦AB的长为( )
A.8cm
B.6cm
C.9cm
D.7cm
查看答案
如图,⊙O的直径CD过弦EF的中点G,∠EOD=40°,则∠DCF等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001308953583632/SYS201311030013089535836002_ST/images0.png)
A.80°
B.50°
C.40°
D.20°
查看答案
如图,A、B、C是⊙O上的三点,∠BAC=45°,则∠BOC的大小是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001308953583632/SYS201311030013089535836001_ST/images0.png)
A.90°
B.60°
C.45°
D.22.5°
查看答案