Can you please help me answer these and explain? Please?

Determine whether the given lengths can be side lengths of a right triangle.

1) 6ft, 10ft, 12ft

2) 10in, 24in, 26in

3) 20m, 21m, 29m

4) 15cm, 17cm, 21cm

5) 14ft, 22.5ft, 26.5ft

6) 12yd, 35yd, 38yd

2 answers

a^2+b^2=c^2

the largest side/hypothenuse is c
a and b are the other two sides

1) 6^2+10^2 = c^2

check to see if that's true or not
Does 5ft, 12ft, and 15ft make a right triangle ?