Learn all about the trigonometry of right triangles. A right triangle is a triangle that has 90 degrees as one of its angles.

Here is the new description with all the links and additional text removed: Learn how to solve equations using the angles sum ...

a missing side in a right-angled triangle when another side and an angle are known. a missing angle in a right-angled triangle when two sides are known. In these formulae, the Greek letter θ (theta) ...