Content about “
Euclidean geometry

Article
A triangular tiling of the hyperbolic plane

A (hi)story of geometry

A story from geometry shows how developments in mathematics have fundamentally changed the way we think about the world around us.

Article

What is a square?

If a shape has equal sides with 90 degree angles between them then it's a square, right? Well, not quite...
Article

How new geometries reshaped our world

The 19th century experienced a geometrical revolution. Find out how the new geometries that were discovered shaped philosophy, science, culture and art.
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Maths in a minute: Not always 180

Did you learn at school that the angles in a triangle always add up to 180 degrees? If yes then your teacher was wrong. Find out why here.
Article

Maths behind the rainbow

Keats complained that a mathematical explanation of rainbows robs them of their magic, conquering "all mysteries by rule and line". But rainbow geometry is just as elegant as the rainbows themselves.