What is Fermat’s last theorem? Fermat’s last theorem is similar to the Pythagorean theorem, which states that the sides of any right triangle give a solution to the equation x 2 + y 2 = z 2 .

At the American Mathematical Society, two teenage girls presented a new proof of the Pythagorean theorem . Keith McNulty, an expert in applied mathematics, said: 'It's a wonderful demonstration ...