A pentagon has 5 sides.
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A pentagon has 5 sides
A pentagon is a 5 sided polygon
It is free to visit the Pentagon but the tours must be booked in advance. You can request a tour of the building by accessing the Pentagon website and searching for Pentagon tours.
A pentagon need not have any vertical lines. It can have at most two.
A pentagon has 5 interior angles and they add up to 540 degrees.