Save guides, add subjects and pick up where you left off with your BBC account. The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the ...

This is usually represented like this because all angles and sides are different. The only way to work out an angle in a scalene triangle is if we know the other two angles. Right-angled triangle.

Pythagoras' theorem describes the relationship between the three sides of a right-angled triangle. It is incredibly useful ...