The Pythagorean theorem, a cornerstone of mathematics for millennia, provides a method for determining unknown sides in right-angled triangles using t ...

Trigonometry explores the relationship between sides and angles in right-angled triangles. The sides of a right-angled triangle are labelled with: Hypotenuse (h) – the longest side, which is ...

Learn about three trigonometric ratios in similar right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.