In geometry, a polygon (/ˈpɒlɪɡɒn/) is a plane figure made up of line segments connected to form a closed polygonal chain.
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In the early years of the 20th century, travelers of the horse-and-buggy era used an unscheduled ferry to cross from Fidalgo Island to Whidbey Island. To call the ferry, they banged a saw with a mallet and then sat back to wait.
Polygons appear in rock formations, most commonly as the flat facets of crystals, where the angles between the sides depend on the type of mineral from which the crystal is made.