A line that is drawn straight through the midpoint of a circle and that has its end points on the circle border is called the diameter d Half of the diameter or the distance from the midpoint to the circle border is called the radius of the circle r. The diameter is the longest chord that runs through the center of the circle. The Circumference of a circle formula in mathematics is given as below Circumference of a Circle C 2pr pd Where p31415 C is the circumference of the circle d is the diameter of the circle and r is the radius of the circle.
C 2pr or C pd.
What is formula of circumference. If you know the radius the circumference formula is. The diameter is the longest chord that runs through the center of the circle. Once you will practice the problems understanding the geometry principles would be easier for you.