The whole numbers a, b, and c are a Pythagorean triple if a and b are the lengths of two sides of a right triangle with hypotenuse c, so a2 + b2 = c2.

The hypotenuse of a right triangle is the triangle's longest side; the side opposite the right angle. The length of the hypotenuse of a right triangle can be found using the Pythagorean theorem ...

The arrow and the word hypotenuse are coloured orange. The triangle is coloured pink., When using trigonometry in right-angled triangles, each side is labelled based on a given angle, Ɵ.