I need help with this question.

Answer:
A = 300 mm2
uhhh im not sure if this is correct..but your welcome
I wouldn't suggest you to take this as an answer...I tried though
Or it could be this:
(2n+1)² + [2n(n+1)]² = [2n(n+1)+1)]²
…and it gave you 7² + 24² = 25² as well as an infinite number of other right triangles where the hypotenuse was one unit longer than one of the other legs.
Eh I rlly don't know