Respuesta :
The circumference of a circle is equal to pi times the diameter.
C=πd
The diameter is two times the radius, so the equation for the circumference of a circle using the radius is two times pi times the radius.
C=2πr
The circumference of a circle is equal to pi times the diameter.
C=πd
The diameter is two times the radius, so the equation for the circumference of a circle using the radius is two times pi times the radius.
C=2πr