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Luxe Prestige Chronicle

13 sided polygon

Author

Sarah Scott

Updated on August 02, 2026

In geometry, a pentadecagon or pentakaidecagon or 15-gon is a fifteen-sided polygon.

Is there a 16 sided polygon?

In geometry, a polygon or a geometrical shape with 16 sides is called a hexakaidecagon or hexadecagon. This is also known as 16-gon. The measure of each internal angle of a regular hexadecagon is 157.5 degrees.

What is a 1 million sided shape called?

A megagon or 1,000,000-gon is a polygon with one million sides (mega-, from the Greek μέγας, meaning “great”, being a unit prefix denoting a factor of one million).

What is a 14 sided polygon called?

In geometry, a tetradecagon or tetrakaidecagon or 14-gon is a fourteen-sided polygon.

What is a 20 sided polygon?

In geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon’s interior angles is 3240 degrees.

What is a 19 sided polygon?

A enneadecagon is a polygon with 19 sides, and the sum of its interior angles is 3060 degrees.

What is a 50 sided shape called?

In geometry, a 50 sided shape is called a pentacontagon or pentecontagon. This is also called a 50-gon (fifty-sided polygon). However, the sum of all the interior angles of a 50 sided polygon is 8640 degrees.

What is the name of a 99 sided shape?

What is a 99 sided shape called? In geometry, an enneacontagon or enenecontagon or 90-gon is a ninety-sided polygon. Thus, the 99 sided shape is called nonacontakainonagon or enneacontanonagon. Here, enneaconta is the prefix for the number of sides numbered from 90 to 99.

What is a 17 sided shape?

But what’s widely considered his first important discovery is his construction of a 17-sided polygon called a heptadecagon, using only a ruler and a compass.

What is an 18 sided shape called?

An 18-sided polygon, sometimes also called an octakaidecagon.

Is a circle an apeirogon?

As nouns the difference between circle and apeirogon

is that circle is (lb) a two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from another point while apeirogon is (mathematics|geometry) a polygon having an infinite number of sides and vertices.

Is Megagon a circle?

A Megagon is a polygon with 1,000,000 sides and angles. Even if drawn at the size of the earth, it would still be very hard to visually distinguish from a circle.