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 ...

March 14 — a day you’re more likely than most others to eat — or throw — a pie and get a reduced price on your pizza. It’s ...