Respuesta :

Answer:

the formula for the circumference is 2πr so... 25.12 cm

The formula for the circumference of a circle is:

C = 2 × π × r       or   C = 2πr

You know:

r = 4             So plug it into the formula

C = 2πr

C = 2π(4)

C = 8π or 25.1327412287    

[I don't know how you need to write your answer or where it needs to be rounded]