"The Pythagorean Theorem states that for any right triangle with legs a and b and hypotenuse c, a² + b² = c². This can be proven using the law of cosine, where the angle opposite of leg c is 90 degrees, yielding c² = a² + b² - 2ab cos(90). Plugging in 90 to cos(90) gives us c² = a² + b², thus proving the Pythagorean Theorem."
Prove the Pythagorean Theorem.?