Answer:
the length of a leg
Step-by-step explanation:
I think you mean the Pythagorean theorem a^2 + b^2 = c^2?
If so, it is describing the relation of a right triangle.
a and b are the legs(doesn't matter which is which) and c is the hypotenuse
take a look at this if you have more questions
https://www.britannica.com/science/Pythagorean-theorem
hope it helps
