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 ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...

Beth Py-Lieberman - Author, The Object at Hand: Intriguing and Inspiring Stories from the Smithsonian Collections Every year, the celebration of Pi Day (March 14 is 3.14) grows more ambitious. Math ...

When Isaac Newton computed pi to 15 decimal places in the 17th century, he wrote, “I am ashamed to tell you to how many figures I carried these computations, having no other business at the time.” The ...

Today is Pi Day, so named because the first three digits of pi are 3.14 and the date is March 14—or 3/14 in the format used in the United States. Yes, on most other parts of Earth today is also March ...

On Pi Day (March 14) we celebrate perhaps the most iconic irrational number on Earth. From its ancient origins to the unanswered questions, here are some of the most surprising facts about pi. When ...

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 all in celebration of pi (Greek letter π), the mathematical constant 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 ...

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 ...