A Pi Day like this won't come around for another century. — -- Circle around, math fans. There's a once-in-a-century Pi Day coming this weekend. The day that celebrates the mathematical ...

National Pi Day is held each year on March 14. It honors 3.14 the ratio of the circumference of a circle. You can also get deals on food too.

We usually think of pi as about 3.14 – but there’s more to it than that. “Pi is a fabulous ratio that’s constant across every single circle,” Lesseig said.

Draw a circle 1 metre across, and its circumference will be pi metres. A circle 1 centimetre across will be pi centimetres around. Ok, but what makes π so special? As the above circle unrolls and its ...

What if we woke up one day and Pi wasn’t 3.14159 anymore? On March 14, the world celebrates Pi Day, honoring this essential ...

In 1880, the German mathematician Ferdinand von Lindermann proved that pi is a transcendental number and that squaring a circle is impossible under the constraints of Euclidean geometry.

Known around the world as "Pi Day," it’s a time to celebrate one of mathematics' most famous constants: Pi, the ratio of a circle's circumference to its diameter, approximately 3.1415.

The area of a circle is pi times the radius squared. This is half of a circle with a radius of 1 (no units) such that it would have an area of pi/2.

Pi, of course, is the ratio of a circle’s circumference to its diameter, a mathematical constant that goes on forever but is commonly approximated as 3.14159.

Learn about the definition of pi in relation to a circle with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Pi is the ratio of a circle's circumference to its diameter. Jana Frank, a franchise owner of Mathnasium, shared some ways to celebrate Pi Day.

Celebrate Pi Day by Learning the Secret of the Circle Hands-on projects are great learning tools for kids, especially when they involve the word ‘secret’.