Answer
n = 5
↓Steps Explained:↓

How many sides does a polygon have:
with a sum of interior angles = 540.?
Calculate sides
D = 180(n - 2)
Divide each side by 180
Add 2 to both sides:
n = D/180 - 2
Solve for n when D = 540.
n = 540./180 + 2
n = 3 + 2
Final Answer
n =
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