Forbes contributors publish independent expert analyses and insights. I write about mathematics and its applications The area and perimeter ratios are shown and as n ...

The ability to round a number to a number of decimal places or to a number of significant figures is essential if answers are to be written to the correct degree of accuracy asked for in a question.

Since ancient times, mathematicians had theorized that there must be some way to calculate the area of a circle using only a compass and a straightedge. Mathematicians thought that with the help of ...