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Regular digon on a sphere
Digons can be used to make a globe. This one is a map by Martin Waldseemüller (15th century). This is the first map that shows the New World, and uses the name "Amerika" for it.

A digon is a shape that has two sides and two corners (vertices). It is impossible to make on a flat surface, called a plane because the sides would be the same, but possible to make on a sphere. It can be made by picking two places on a great circle and connecting them. If the places are opposite each other, the digon is called a regular digon.