What is the relationship between pi, radius, diameter and circumference?
pi is almost equal to 3.14. However no one knows the true value of pi. So whenever you are solving an equation don’t change pi to 3.14. Any ways radius is half the diameter and the diameter is the distance from one point of a circle to another point of a circle. Circumference is the distance around a circle. It is the same thing as perimeter but since circles aren’t shapes with corner they use circumference to figure it out.