Hi,
Let x represent the shorter leg, then we have:
a right triangle with x & (x+1m) as legs and (x+2m)as the hypotenuse
using the Pythagorean Theorem to solve
Simplifying
factoring
(x-3)(x+1)=0
x = -1 cannot use this value
x = 3
Triangular lot has the dimensions 3m , 4m and 5m
check our answer using Pythagoream theorem
9 + 16 = 25