The circumference of a circle is the distance around the shape. The ability to round a number to a number of decimal places or to a number of significant figures means that answers can be written to ...

Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its diameter. A precise determination of pi, as we know this ratio today, had long been of ...

When working with circles it is important to recognise and be able to name different parts of the circle. A segment of a circle is an area enclosed by a chord and an arc. What is the name given to a ...

Introduction Mathematicians get excited about the discovery of mathematical relationships. They look at the world around them in terms of numbers, formulas and equations. Mathematics is fun and ...

Lorenzo Sadun has received funding from the National Science Foundation. Happy Pi Day, where we celebrate the world’s most famous number. The exact value of π=3.14159… has fascinated people since ...