Which set of side measurements could represent a right triangle?

Question

200 cm , 300 cm, 500 cm

300 cm, 400 cm, 500 cm

400 cm, 300 cm, 500 cm

600 cm, 700 cm, 800 cm

Answer 1

300 cm, 400 cm and 500 cm are sides of a right triangle

same with

400 cm, 300 cm and 500 cm are sides of a right triangle

500 cm is the hypotenuse

It's a 3-4-5 right triangle increased by a factor of 100

3^2 + 4^2 = 5^2

9+ 16 = 25

300^2 + 400^2 = 500^2

90000 + 160000 = 250000