A small circle with the radius of I cm moves around a large circle with the diameter of 6 cm.How long does the small circle go?How many rounds does the small cicle move?

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AsmallcirclewiththeradiusofIcmmovesaroundalargecirclewiththediameterof6cm.Howlongdoesthesmallcircleg

A small circle with the radius of I cm moves around a large circle with the diameter of 6 cm.How long does the small circle go?How many rounds does the small cicle move?
A small circle with the radius of I cm moves around a large circle with the diameter of 6 cm.
How long does the small circle go?How many rounds does the small cicle move?

A small circle with the radius of I cm moves around a large circle with the diameter of 6 cm.How long does the small circle go?How many rounds does the small cicle move?
小圆绕大圆运动一周的距离等于大圆的周长=6π=18.84 cm
小圆绕大圆运动一周转过的圈数=6π/2π=3 圈

半径为1cm 的小圆绕直径为6cm 的大圆滚动,问小圆滚动动的距离有多长,问小圆滚动了多少周才能滚完?