explaining on Instagram: "The theorem of Pythagoras, also known as the Pythagorean theorem, is a fundamental concept in geometry that describes the relationship between the lengths of the sides of a right-angled triangle. ..The theorem states that the square of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides. Mathematically, this is expressed as a² + b² = c², where a and b are the lengths of the two shorter sides, and c is the length of the hypotenuse