Use the formula: (A = frac{1}{4}sqrt{5(5+2sqrt{5})},s^2)
Let (s) be the side length of the regular pentagon
Substitute the side length into the formula
Simplify to get the area
If the apothem (a) and perimeter (P) are known, use: (A = frac{1}{2}aP)
Find the perimeter by multiplying the side length by 5
Substitute the apothem and perimeter into the formula
Simplify to get the area