Find the area of a pentagon with an apothem of 5 units. round to the nearest hundredth

The area of a pentagon is given by:
 A = (5 * L * ap) / 2
 Where,
 L: length of the sides
 ap: apothem
 Then, L in function of the apothem is given by:
 L = 2 * tan (theta / 2) * ap
 Where,
 theta: central angle
 Substituting:
 A = (5 * (2 * tan (theta / 2) * ap) * ap) / 2
 A = (5 * (2 * tan (72/2) * 5) * 5) / 2
 A = (5 * (2 * tan (36) * 5) * 5) / 2
 A = 90.82 units ^ 2
 
 the area of a pentagon with an apothem of 5 units is:
 A = 90.82 units ^ 2

Ithink the answer is c