What is the relationship between pi, radius, diameter and circumference?

The circumference of a circle is given by the equation

C = 2 * pi * r

Where C is the circumference, pi is pi, and r is the radius. The radius is equal to one half of the diameter of a circle and measures the distance from the center of the circle to the edge of the circle.

By rearranging the above equation, we see that the constant pi can be defined by:

pi = C / (2 * r)

And since the radius is equal to half of the diameter, we can write

pi = C / d

Where d = diameter of the circle.

Hope this helps!

The relationship between pi (π), radius (r), diameter (d), and circumference (C) is defined by the formula: C = π * d or C = 2 * π * r. Here, π is a mathematical constant approximately equal to 3.14159, r is the radius of a circle, d is the diameter of a circle, and C is the circumference. The formula shows that the circumference of a circle can be calculated by multiplying either π with the diameter or 2π with the radius.