Multiple choice general knowledge math & puzzles what is pythagoras theorem? Note: C is greater than other 2 in length c^2 = a^2+b^2 a^2 = b^2+c^2 b^2 = c^2+a^2 None of the above Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Pythagorean theorem states that in a right-angled triangle, the square of the hypotenuse (the longest side, C) is equal to the sum of the squares of the other two sides (a and b). This is expressed as c^2 = a^2 + b^2.