Find the surface area of the pentagon-based pyramid with a slant height of 9 in.

Answer:
56 square inches
Step-by-step explanation:
[tex]\sf \boxed{\bfSurface \ area \ of \ pentagonal \ pyramid = \dfrac{5}{2}*b(a+s)}[/tex]
Here, b is the base of the pentagonal pyramid.
a is the Apothem of the pentagon.
S is the slant height.
[tex]\sf = \dfrac{5}{2}*2*(2.2 + 9)\\\\ =\dfrac{5}{2}*2*11.2\\\\= 56 \ in^2[/tex]