Respuesta :
Answer:
Circum of circle=
is 2 pie radius
2x3.14x4
=25.13
Step-by-step explanation:
if the diameter is 4cm, then the radius is 2cm since d=2r
to find the circumference we use the equation (2)(pi)(r) = (2)(3.14)(2) = 12.56
to find the circumference we use the equation (2)(pi)(r) = (2)(3.14)(2) = 12.56