The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...

The most famous theorem of the Ionian philosopher, Pythagoras, states that the square on the hypotenuse of a right triangle is equal to the sum of the squares on the two legs (or a² + b² = c²). If you ...