0/360*2*π×r +2r
135/360*2*11*π +2*11
135/360*22π+22
135/360*69+22
0.375*69+22
=47.875
47.875cm > 47.5cm
![03602πr 2r 135360211π 211 13536022π22 1353606922 03756922 47875 47875cm gt 475cm class=](https://us-static.z-dn.net/files/d39/09133fa6397e091e03b330e3b943f135.png)