A 39-sided shape is called a "triacontaenneagon." The name is derived from the Greek prefixes "triaconta-" (meaning thirty) and "-enneagon" (meaning nine-sided polygon). The triacontaenneagon has 39 sides, 39 angles, and 39 vertices.
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Decagon. A decagon is the name of a ten sided shape.
A 10-sided shape is a decagon.
A Pentacontagon is a fifty sided shape ...
hundred sided shape is called a chlligon
A 70 sided shape is called a heptacontagon.