The formula to calculate the area of a circle, with radius \(r\) is: \(\text{area of a circle} = \pi r^2\) ...

Rearranging the formula for the circumference of a circle makes the radius the subject. Start with the new subject and write out the function machine for the formula, showing each operation step by ...

A crop circle thought to be inspired by a formula acclaimed as the most beautiful in all mathematics has appeared on a hillside in Wiltshire. By Matthew Moore and Matthewmoore 24 May 2010 • 5:30pm The ...