Inspired by Paul Taylor, I have made a pendulum to calculate pi. A piendulum. Its length is a quarter of the value for the acceleration due to gravity, so its period is exactly one pi.
Watch Paul's version: • The Aperiodical's π Approximation Cha...
Watch a mile of pi: • Mile of Pi Numberphile
Music by Howard Carter
Design by Simon Wright
MATT PARKER: Standup Mathematician
Website: http://standupmaths.com/
New book: http://makeanddo4D.com/
Nerdy maths toys: http://mathsgear.co.uk/