Want to know the radius of a circle from its diameter, perimeter, or area? We'll show you all the quick and easy methods!

Pi is part of Egyptian mythology Egyptians believed that the pyramids of Giza were like math marvels, built on the principles of pi. The fun fact about this pi connection? Well, imagine this: The ...

Image caption, The diameter is the whole distance across the circle, through its centre. The diameter is two radii. The radius is half of the diameter. The radius is the distance from the centre ...

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 ...

Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and ... of a circle by its radius. But the most significant ...