Given x2+y2=z2x^2 + y^2 = z^2x2+y2=z2, which of these is a Pythagorean triple?
(1,1,2)(1, 1, \sqrt{2})(1,1,2)
(3,4,5)(3, 4, 5)(3,4,5)
(2,2,4)(2, 2, 4)(2,2,4)
(1,2,3)(1, 2, 3)(1,2,3)