.
The condition describes an IMPOSSIBLE situation,
and below I give the proof to this fact.
Let the legs be x and y.
Then from the condition you have THESE two equations:
x^2 + y^2 = 2^2
= 2,
or, EQUIVALENTLY,
x^2 + y^2 = 4, (1)
xy = 4. (2)
Then (x-y)^2 = x^2 -2xy + y^2 = (x^2+y^2) - 2xy = 4 - 2*4 = -4.
But the left side (x-y)^2 is a NON-NEGATIVE value/quantity, while the right side is NEGATIVE.
Contradiction.
Conclusion: The condition is self-contradictory.