Pythagorean theorem

noun

Geometry.

1. the theorem that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.

Pythagorean theorem

1. A theorem stating that the square of the length of the hypotenuse of a right triangle is equal to the sum of the squares of the lengths of the other sides. It is mathematically stated as c ² = a ² + b ², where c is the length of the hypotenuse and a and b the lengths of the other two sides.

Word History and Origins

Origin of Pythagorean theorem¹

First recorded in 1905–10