Mathematics for IGCSE & O level - Mensuration (Section 8 - No. 11)
What is the relationship between the radius and circumference of a circle?
Circumference = 2π * radius
Radius = 2π * circumference
Radius = π * circumference
Circumference = π * radius
Εξήγηση
The circumference is calculated by multiplying 2, pi, and the radius.