Welcome to a city where pi equals 4 and circles aren’t round. By Steven Strogatz Photo illustrations by Jens Mortensen Each installment of “Math, Revealed” starts with an object, uncovers ...

From four-dimensional hexagons to the mind-bending amplituhedron, geometrical shapes are wilder than we learn at school - and ...

GCSE Maths Geometry and measure learning resources for adults, children, parents and teachers.