Illustrated definition of Diameter. We can rewrite that relationship. Circumference C can be placed in a ratio with diameter d with the answer pi p.
In this equation C represents the circumference of the circle and d represents its diameter.
The above formula simply tells us that the diameter is 2 times the radius. A circle has a diameter of 10 m. You can write this formula in shorthand as d2r. You can transform this into r Ap cm.