Use the formula: C = 2πr
Or use the formula: C = πd
C = circumference
r = radius
d = diameter
Measure the radius and multiply by 2π
Measure the diameter and multiply by π
Use π ≈ 3.14 if needed
Use the formula: C = 2πr
Or use the formula: C = πd
C = circumference
r = radius
d = diameter
Measure the radius and multiply by 2π
Measure the diameter and multiply by π
Use π ≈ 3.14 if needed