Pythagoras' theorem is a fundamental principle in geometry that describes the relationship between the sides of a right triangle. It states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.

Mathematically, if �a, �b, and �c represent the lengths of the sides of a right triangle, with �c being the length of the hypotenuse, then Pythagoras' theorem can be expressed as:

�2+�2=�2a2+b2=c2