Does 2.1, 7.2, 7.5 form a right triangle?

In any right triangle
if the legs are lenght a and b and the hypotohuse is lengh c then
a²+b²=c²

the longest length is the hypothuse
so c=hypothuse=7.5

2.1 and 7.2 are the legs
2.1²+7.2²=7.5² should be true if it is a right triangle
evalaute
4.41+51.84=56.25
56.26=56.25
true

they do form a right triangle

Um what? rephrase that ?