Two Black teenage girls from New Orleans say they could be the first mathematicians in at least 2,000 years to find trigonometric proof for the Pythagorean Theorem. "After we get it peer reviewed ...

Learn about and revise how Pythagoras’ theorem can be used to calculate the sides of right-angled triangles with this Bitesize GCSE Maths Edexcel guide.

Revise trigonometric ratios of sine, cosine and tangent and calculate angles in right-angled triangles with this Bitesize GCSE Maths Edexcel guide.