What is the area of the regular pentagon below? round to nearest whole number ! !

For this case, the area of the pentagon is given by:
 A = (5) * (1/2) * (b) * (h)
 Where,
 b: base of the triangle.
 h: height of the triangle.
 Substituting values we have:
 A = (5) * (1/2) * (2.36) * (1.62)
 A = 9,558 units ^ 2
 Rounding:
 A = 10 units ^ 2
 
 A = 10 units ^ 2
 option C

I you were choosing b it would've been D