Length 1 a= 36
Length 2. b = 85
Then a^2 + b^2 = c^2
or also
b^2 - a^2 = c^2
Now find
36^2 + 85^2 = 1296 + 7225= 8521
Then find square root
√8521 = 92 + 57/185 aproximate.
√8521= 92.31
85^2 - 36^2= 5929 = 77^2
√77^2= 77
Then ANSWER IS
third side is called LEG
And its value is
c= 77