A simple guide on how to show the circumference of a circle is π x diameter aimed at children aged between 11 and 14 ...

This KS2 maths article explains how to measure the radius, circumference and diameter of a circle.

How to Solve for Radius in Excel. The radius of a circle or a sphere is the distance between the center and the edge. The radius can be used to calculate a circle's diameter, area and circumference.

Every year, the celebration of Pi Day (March 14 is 3.14) grows more ambitious. Math teachers love to dream up unique classroom activities to celebrate Pi for it endless opportunity to calculate (3 ...