Using π = 3۰142, find the circumference a circle with a diameter of 9 m. Give the answer to 2 decimal places. 3۰142 × 9 = 28۰278. This is rounded to 2 decimal places. The circumference of the ...

Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its ... Mathematicians find a closer approximation every year—in 2002, for example ...

Here’s a little more about the holiday’s origin and how it’s celebrated today. Pi can calculate the circumference of a circle by measuring the diameter — the distance straight across the circle’s ...

Building the full value of pi has been a project thousands of years in the making, but just how much of this infinite number do we actually need, asks our maths columnist Jacob Aron ...