Learn about and revise approximation using a range of rounding and estimation techniques with this BBC Bitesize GCSE Maths Eduqas study guide.

What is Pi Approximation Day? Pi is a special unit in mathematics. Presenting the relationship between a circle's circumference and diameter, the ratio of the two is stated as a constant pi.

Revise approximation for your maths GCSE foundation and higher exams with Bitesize interactive practice quizzes covering feedback and common errors.

Pi Approximation Day is observed to honour mathematics and the characteristics of π. What is Pi? π represents the ratio of a circle's circumference to its diameter.

Annals of Mathematics, a distinguished journal of research papers in pure mathematics, was founded in 1884. Annals of Mathematics is published bimonthly with the cooperation of Princeton University ...