Respuesta :

I hope this helps you



radius=diameter/2


radius=7/2=3,5


Circumference =2pi.r


Circumference =2.3,14.3,5


Circumference =21,98
I HOPE THIS HELPS!!!


c = 2 x 7 x 3. 14 = 43.96 A = 3.14 x 7 x 7 = 158.86  2nd one.