thank you~

来源：学生作业帮助网编辑：六六作业网时间：2024/12/22 17:32:40

thankyou~thankyou~ thankyou~图1有两个半径为r的圆,其周长为：c1=2*2*PI*r=4PIr（PI为圆周率）图2的周长为c2=2*PI*r+2*PI*r/2+2

thank you~
thank you~

thank you~
图1有两个半径为r的圆,其周长为：c1=2*2*PI*r=4PIr（PI为圆周率）
图2的周长为c2=2*PI*r+2*PI*r/2+2*PI*r/3+2*PI*r/6=4PIr
两种方案的材料一样多

thank you thank you thank you thank you~ thank you Thank you Thank you Thank you, Thank you Thank You Thank you! THANK YOU Thank you Thank.You thank you thank you~ Thank you. thank you!