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.

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.

As we celebrate again in 2018, here are some Pi Day facts you should know. What Is Pi? Pi represents the ratio of a circle’s circumference to its diameter.

GCSE Eduqas Circles, sectors and arcs - Eduqas Circumference of a circle Circles are 2D shapes with one side and no corners. The circumference is always the same distance from the centre - the ...

Pi is a mathematical constant value used to calculate the circumference of a circle and is denoted by the Greek letter π. Let us find out who discovered Pi, what the value of Pi is, how it is ...

During the first celebration, the Exploratorium's employees marched around one of the circular spaces of the museum because Pi is the ratio of a circle's circumference to its diameter.

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.