Question

does the set of numbers form a pythagorean triple explain 24 , 10 ,26

Answer 1

Pythagorean says a^2 + b^2 = c^2

10^2 + 24^2 = 26^2

100 + 576 = 676

That is true

Answer 2

You can test each one by using a²+b²=c² 
So take 4,5,6 for example 
4² + 5² = 6² 
16 + 25 = 36 
41 = 36