Double Math

9 Sided Polygon – Nine Sided Shape

What is a Nine Sided Shape?

9 Sided Polygon

With nine straight sides that meet at nine corners make a polygon that is called a Nonagon. Nonagon is a 2D nine sided shape that belongs to the family. The word  “nonagon ” comes from the Latin word  “nona “, meaning nine, and  “gon “, meaning sides. So it literally means  “nine-sided shape “.

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There are 9 straight sides and 9 vertices connecting these straight sides in a nonagon. The Sum of all the interior angles of a nine-sided polygon is equal to 1260 degrees.

In Greek, a nonagon is called an enneagon, which means “nine corners”.

Types of (Nonagon) 9-Sided Shape

There are two types of nonagon.

  • Regular Nonagon
  • Irregular Nonagon

Regular Nonagon

  • It is a two-dimensional shape.
  • It has nine vertices.
  • Each interior angle is at 140^\circ and the sum of these interior angles is 1260^\circ.
  • It’s all straight lines that have equal lengths.
  • It has an exterior angle equal to 360 degrees.
Nine Sided Shape

Irregular Nonagon

  • The sum of all of its interior angles is 1260^\circ degrees.
  • Angles at varying degrees.
  • It is a nine-sided, two-dimensional shape
  • Additionally, it has straight lines
  • The sides are not equal in length.
Nine Sided Shape