What Is a 100-Sided Shape Called?

A polygon with 100 sides called a heptagon. It is derived from the Greek word “hecta,” which means “100,” and “gon,” which originally meant “knee” but later signified “angle.”

A polygon is a closed, two-dimensional geometric structure composed of many line segments, with each side intersecting only two other segments at a vertex. Common prefixes for the number of sides of a polygon are “tetra,” “penta,” “hexa,” “hepta,” and “octa” for the numbers 4, 5, 6, 7, and 8, respectively. The standard names for polygons are pentagon, hexagon, heptagon, octagon, nonagon, and decagon. A “n-gon” is a polygon with n sides, where n is changeable.