Question 1007056
Convert 2 ft into inches:
2 ft = 24 in

Solve using the Pythagorean Theorem:
a^2 + b^2 = c^2

Let the length be a 
Let the width be b

a^2 + b^2 = c^2
(24 in)^2 + (18 in)^2 = c^2
576 in^2 + 324 in^2 = c^2
900 in^2 = c^2
30 in = c 

Final Answer: 30 in or 2.5 ft