Its name refers to it's shape from a plan view, five sided with equal interior angles.
Chat with our AI personalities
the pentagon got its name from the root penta meaning 5 or 5 sides.
Pentagon.
pentagonal triangle
A Pentagon.
A pentagon would have 5 sides. If it had 12 sides it would not be a pentagon. Maybe you mean a dodecahedron with 12 sides. I don't know what you would call that.