满分5 >
初中数学试题 >
(2007•临沂)小明随机地在如图所示的正三角形及其内部区域投针,则针扎到其内切...
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142016_ST/images0.png)
(2007•临沂)小明随机地在如图所示的正三角形及其内部区域投针,则针扎到其内切圆(阴影)区域的概率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142016_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142016_ST/1.png)
π
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142016_ST/2.png)
π
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142016_ST/3.png)
考点分析:
相关试题推荐
(2007•临沂)如图,矩形ABCD中,AB=1,AD=2,M是CD的中点,点P在矩形的边上沿A⇒B⇒C⇒M运动,则△APM的面积y与点P经过的路程x之间的函数关系用图象表示大致是下图中的( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142015_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142015_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142015_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142015_ST/images3.png)
D.
查看答案
(2007•临沂)如图,在△ABC中,AB=2,AC=1,以AB为直径的圆与AC相切,与边BC交于点D,则AD的长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142014_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142014_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142014_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142014_ST/2.png)
D.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142013_ST/images0.png)
(2007•临沂)直线l
1:y=k
1x+b与直线l
2:y=k
2x在同一平面直角坐标系中的图象如图所示,则关于x的不等式k
1x+b>k
2x的解为( )
A.x>-1
B.x<-1
C.x<-2
D.无法确定
查看答案
(2007•临沂)已知反比例函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142012_ST/0.png)
的图象在第二、四象限内,函数图象上有两点A(2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142012_ST/1.png)
,y
1),B(5,y
2),则y
1与y
2的大小关系为( )
A.y
1>y
2B.y
1=y
2C.y
1<y
2D.无法确定
查看答案
(2007•临沂)若a<b<0,则下列式子:①a+1<b+2;②
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142011_ST/0.png)
>1;③a+b<ab;④
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142011_ST/1.png)
<
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110454988114224/SYS201310191104549881142011_ST/2.png)
中,正确的有( )
A.1个
B.2个
C.3个
D.4个
查看答案