If what ? What is the If part, so I can help answer your question.
Posted a picture showing the solution. Everything is on it, including calculations.
The answer is 142 square inches (or 142 in.^2) same thing.
Hope this helps!
55.405 is bigger then 55.045
Answer:
for any pentagon the interior angles add up to n-2 times 180 degrees.
n-2
180(n)