noun
Mathematical term for the theorem that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides.
ピタゴラスの定理は直角三角形に適用される。
The Pythagorean theorem applies to right triangles.
From the name of the ancient Greek mathematician Pythagoras (ピタゴラス) and 定理 (theorem).