From four-dimensional hexagons to the mind-bending amplituhedron, geometrical shapes are wilder than we learn at school - and they are a crucial tool for understanding reality ...

Revise how to work out the equation of a straight line using coordinates and the gradient, and vice versa. BBC Bitesize Scotland SQA National 5 Maths.

For clarity, number the lines from 1 to 6, and look at the triangle defined by lines 1, 2 and 3. It’s the same triangle whether you choose line 1, then line 2, then line 3; or line 1, then line ...

In the decimal notation we use today, this translates to 3.1429 to 3.1408. That's pretty close to the known value of 3.1416. (For simplicity's sake, we round off all figures to four decimal places.) ...