满分5 >
初中数学试题 >
(2001•绍兴)如图,梯形ABCD中,AD∥BC(AD<BC),AC、BD交于...
(2001•绍兴)如图,梯形ABCD中,AD∥BC(AD<BC),AC、BD交于点O,若
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450019_ST/0.png)
,则△AOD与△BOC的周长比是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450019_ST/images1.png)
A.1:2
B.2:3
C.3:4
D.4:5
考点分析:
相关试题推荐
(2001•绍兴)如图,△ABC中,∠C=90°,AC=8cm,AB=10cm,点P由点C出发以每秒2 cm的速度沿线CA向点A运动(不运动至A点),⊙O的圆心在BP上,且⊙O分别与AB、AC相切,当点P运动2秒钟时,⊙O的半径是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450018_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450018_ST/0.png)
cm
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450018_ST/1.png)
cm
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450018_ST/2.png)
cm
D.2cm
查看答案
(2001•绍兴)直线y=3x与双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450017_ST/0.png)
的一个分支相交,则该分支位于( )
A.第一象限
B.第二象限
C.第三象限
D.第四象限
查看答案
(2005•四川)在△ABC中,已知∠C=90°,BC=4,sinA=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450016_ST/0.png)
,那么AC边的长是( )
A.6
B.2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450016_ST/1.png)
C.3
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450016_ST/2.png)
D.2
查看答案
(2001•绍兴)圆锥的侧面展开图是半径为3cm的半圆,则此圆锥的底面半径是( )
A.1.5cm
B.2cm
C.2.5cm
D.3cm
查看答案
(2001•绍兴)如图,⊙O中,直径CD垂直于弦AB于点E,若AB=4,CE=1,则⊙O的半径是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435746945015/SYS201310191054357469450014_ST/images0.png)
A.2
B.2.5
C.3
D.3.5
查看答案