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(2004•枣庄)如图,一块边长为10cm的正方形木板ABCD,在水平桌面上绕点...
(2004•枣庄)如图,一块边长为10cm的正方形木板ABCD,在水平桌面上绕点D按顺时针方向旋转到A′B′C′D′的位置时,顶点B从开始到结束所经过的路径长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232550768876078/SYS201310212325507688760003_ST/images0.png)
A.20cm
B.20
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232550768876078/SYS201310212325507688760003_ST/0.png)
cm
C.10πcm
D.5
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232550768876078/SYS201310212325507688760003_ST/1.png)
πcm
考点分析:
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