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如图,一块边长为8cm的正三角形木板ABC,在水平桌面上绕点B按顺时针方向旋转至...
如图,一块边长为8cm的正三角形木板ABC,在水平桌面上绕点B按顺时针方向旋转至A′BC′的位置时,顶点C从开始到结束所经过的路径长为(点A,B,C′在同一直线上)( )
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A.16π
B.
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π
C.
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π
D.
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π
考点分析:
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