R And let the circle have a radius r.
这个圆环的半径是。
R You go around a circle which has radius r.
你绕圈的半径为。
r I can take a rod with a radius r, which is 0.5 centimeters.
假设一根棒子半径,等于0。5厘米。
R So if C is the circle, R is the disk of radius A.
就是C所包围的区域。,Well,,R,is,the,region,enclosed,by,C。,如果C是一个圆,R就是半径为a的圆盘。
R So if C is the circle, R is the disk of radius A.
就是C所包围的区域。,Well,,R,is,the,region,enclosed,by,C。,如果C是一个圆,R就是半径为a的圆盘。
应用推荐