Apply the Pythagorean theorem formula:
c^2 = a^2 +b ^2
Where;
c= hypotenuse = the longest side
a & b = the other 2 legs of the triangle
option 1
4,5,6
Replace:
6^2 = 4^2+5^2
36= 16+25
36= 41 NOT A RIGHT TRIANGLE
option 2
3,4,5
hypotenuse = 5 (longest side)
5^2 = 3^2+4^2
25 = 9 +16
25= 25 RIGHT TRIANGLE
Correct option: (3,4,5)