满分5 >
初中数学试题 >
(2000•福建)一个正多边形的中心角为36°,则它的边数是 .
(2000•福建)一个正多边形的中心角为36°,则它的边数是 .
考点分析:
相关试题推荐
(2000•武汉)若正方形的四个顶点分别在直角三角形的三条边上,直角三角形的两直角边的长分别为3cm和4cm,则此正方形的边长为
cm.
查看答案
(2000•山西)已知:如图,在▱ABCD中,E、F分别是边AD、BC的中点,AC分别交BE、DF于C、H.请判断下列结论:(1)BE=DF;(2)AG=GH=HC;(3)EG=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724992105264/SYS201310212327249921052000_ST/0.png)
BG;(4)S
△ABE=3S
△AGE.其中正确的结论有( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724992105264/SYS201310212327249921052000_ST/images1.png)
A.1个
B.2个
C.3个
D.4个
查看答案
(2000•上海)在梯形ABCD中,AD∥BC,AC,BD相交于点O,若AD:BC=1:3,那么下列结论中正确的是( )
A.S
△COD=9S
△AODB.S
△ABC=9S
△ACDC.S
△BOC=9S
△AODD.S
△DBC=9S
△AOD
查看答案
(2000•绍兴)如图,梯形ABCD中,AD∥BC,∠ABC=Rt∠,对角线AC⊥BD于P点.已知AD:BC=3:4,则BD:AC的值是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724991959939/SYS201310212327249919599028_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724991959939/SYS201310212327249919599028_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724991959939/SYS201310212327249919599028_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724991959939/SYS201310212327249919599028_ST/2.png)
D.
查看答案
(2000•安徽)已知正方形ABCD,E是CD的中点,P是BC边上的一点,下列条件中不能推出△ABP与△ECP相似的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232724991959939/SYS201310212327249919599027_ST/images0.png)
A.∠APB=∠EPC
B.∠APE=90°
C.P是BC的中点
D.BP:BC=2:3
查看答案