which of the following sets of numbers could represent the three sides of a right triangle

{11,59,61}
{20,21,30}
28,45,54}
{10,24,26}

The set {20,21,30} could represent the three sides of a right triangle, as it follows the Pythagorean theorem (a^2 + b^2 = c^2) for a right triangle. In this case, 20^2 + 21^2 = 400 + 441 = 841, and 30^2 = 900, so it is a right triangle.