满分5 >
初中数学试题 >
如图,半径为1的圆中,圆心角为120°的扇形面积为( ) A. B. C. D....
如图,半径为1的圆中,圆心角为120°的扇形面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145013_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145013_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145013_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145013_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145013_ST/3.png)
考点分析:
相关试题推荐
如图,正六边形ABCDEF的边长是a,分别以C、F为圆心,a为半径画弧,则图中阴影部分的面积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145012_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145012_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145012_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145012_ST/2.png)
D.
查看答案
如图,有一住宅小区呈三角形ABC形状,且周长为2 000m,现规划沿小区周围铺上宽为3m的草坪,则草坪的面积(精确到1)是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145011_ST/images0.png)
A.6000m
2B.6016m
2C.6028m
2D.6036m
2
查看答案
如图,三个半径都为2的圆两两外离,则图中阴影部分的面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145010_ST/images0.png)
A.π
B.2π
C.3π
D.4π
查看答案
如图,A是半径为1的⊙O外的一点,OA=2,AB是⊙O的切线,点B是切点,弦BC∥OA,连接AC.则图中阴影部分面积等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145009_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145009_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145009_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145009_ST/2.png)
D.
查看答案
如图,以BC为直径,在半径为2的圆心角为90°的扇形内作半圆,交弦AB于点D,连接CD,则阴影部分的面积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145008_ST/images0.png)
A.π-1
B.π-2
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145008_ST/0.png)
π-1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849614599/SYS201311031009178496145008_ST/1.png)
π-2
查看答案