Answer:
c = 10 cm
Step-by-step explanation:
The circumference formula is C = πd. We want to solve this for the diameter, d:
C
d = -------
π
Substituting 31.4 cm for d, we get:
31.4 cm
d = -------------- = 10 cm, when 3.14 is used as an approximation for π/
3.14
