满分5 >
初中数学试题 >
(2000•昆明)已知:如图,∠BPC=50°,∠ABC=60°,则∠ACB是(...
(2000•昆明)已知:如图,∠BPC=50°,∠ABC=60°,则∠ACB是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698027_ST/images0.png)
A.40°
B.50°
C.60°
D.70°
考点分析:
相关试题推荐
(2000•重庆)如图,⊙O中,弦AD∥BC,DA=DC,∠AOC=160°,则∠BCO等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698026_ST/images0.png)
A.20°
B.30°
C.40°
D.50°
查看答案
(2000•武汉)已知下列四个命题:
①过原点O的直线的解析式为y=kx(k≠0);
②有两边和其中一边上的高对应相等的两个三角形全等;
③有两边和其中一边上的中线对应相等的两个三角形全等;
④在同圆或等圆中,若圆周角不等则所对的弦也不等.
其中不正确的命题是( )
A.只有①②
B.①②③
C.①②④
D.②③④
查看答案
(2000•东城区)已知:如图,⊙O中直径AB垂直于弦CD,垂足为E,若AB=10,CD=6,则BE的长是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698024_ST/images0.png)
A.1
B.2
C.3
D.4
查看答案
(2000•荆门)已知⊙O的弦AB长8cm,弦心距为3cm,则⊙O的直径是( )
A.5cm
B.10cm
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698023_ST/0.png)
cm
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698023_ST/1.png)
cm
查看答案
(2000•荆门)如图,A点是半圆上一个三等分点,B点是弧AN的中点,P点是直径MN上一动点,⊙O的半径为1,则AP+BP的最小值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698022_ST/images0.png)
A.1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698022_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232717094869838/SYS201310212327170948698022_ST/1.png)
D.
查看答案