Respuesta :
I guess you are referring to a circle.
Circumference = pi * d (where d = diameter)
also
C = 2 pi r which is the same as the above because d = 2r (r = radius)
Circumference = pi * d (where d = diameter)
also
C = 2 pi r which is the same as the above because d = 2r (r = radius)
