“圆周”用英语怎么说

圆周上各点离圆心的距离相等。All points on a circle are equidistant from the centre.圆周内两直径必相交.Any two diameters of a circle intersect each other.圆的直径与圆周有相互关系.The diameter and the circumference of a circle correlate....

“圆周”的拼音为：yuán zhōu...