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What Is A Shape With Nine Sides Called?

Fractions of 9sided Polygon ClipArt ETC
Fractions of 9sided Polygon ClipArt ETC from etc.usf.edu

Shapes are an essential part of our lives, and we encounter them almost every day. From the basic shapes like circles, triangles, and squares to the more complex shapes like polygons and polyhedrons. In this article, we will be discussing a shape that is not as common as the others, but it's still important to know. We will be exploring what a shape with nine sides is called.

What is a Polygon?

A polygon is a two-dimensional geometric shape that has three or more straight sides and angles. Polygons are classified according to the number of sides they have. A triangle is a polygon with three sides, a square is a polygon with four sides, and so on. Polygons with five sides or more are called regular polygons.

What is a Nonagon?

A nonagon is a regular polygon with nine sides and nine angles. The word "nonagon" comes from the Greek words "nona," meaning nine, and "gon," meaning angle. In a nonagon, each interior angle measures 140 degrees, and each exterior angle measures 40 degrees. A nonagon is a unique shape that is not commonly used in everyday life, but it has its applications in various fields such as mathematics, engineering, and architecture.

Properties of a Nonagon

A nonagon has several properties that make it a unique shape. Some of these properties include:

  • A nonagon has nine sides and nine angles
  • All the sides of a nonagon are equal in length
  • All the interior angles of a nonagon add up to 1260 degrees
  • The measure of each interior angle in a nonagon is 140 degrees
  • The measure of each exterior angle in a nonagon is 40 degrees

Real-life Examples of Nonagons

While nonagons are not as common as other shapes, they can still be found in various real-life examples. Some examples of nonagons include:

  • The ENIAC computer at the University of Pennsylvania has a nonagon-shaped plaque on its base
  • The Nonagon Pavilion in Trinidad and Tobago is a nine-sided structure that houses various events and activities
  • The nonagon-shaped stop sign in the United States is a familiar example of a nonagon in everyday life

Conclusion

In conclusion, a shape with nine sides is called a nonagon. Nonagons are regular polygons with unique properties that make them important in various fields such as mathematics, engineering, and architecture. While they are not as common as other shapes, nonagons can still be found in various real-life examples. Understanding the properties and applications of nonagons is essential for anyone interested in geometry and its applications.

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