5.18 is irrational because it cannot be a fraction.
The answer is (LxW) every square is (LxW) it does not matter what size.
Answer:
Law of Sines
Step-by-step explanation:
Law of Sines: 
Step 1: Solve for m∠B

25sinx = 27sin36°
sinx = 27sin36°/25

m∠B ≈ 39.4°
Step 3: Find m∠C
180 - (36 + 39.4)
180 - 75.4
m∠C = 104.6°
Using Pythagorean’s theorem, the side length is sqrt(89)