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

Question

A{49,64,80\}{49,64,80}
B{45,60,75\}{45,60,75}
C{48,55,72\}{48,55,72}
D{34,56,65\}{34,56,65}

Answer 1

just check to be sure that a^2 + b^2 = c^2
where c is the longest side.

It might help to remember a few basic Pythagorean triples:
3-4-5
5-12-13
etc. Those and any of their multiples will form a right triangle.

The useless duplication is just annoying.