半径为6cm的圆,60°圆周角所对弧的弧长为_cm.
问题描述:
半径为6cm的圆,60°圆周角所对弧的弧长为______cm.
答
=4πcm.120π×6 180
半径为6cm的圆,60°圆周角所对弧的弧长为______cm.
=4πcm.120π×6 180