Undecagon meaning

An undecagon is a polygon with eleven sides.


Undecagon definitions

Word backwards nogacednu
Part of speech Noun
Syllabic division Un-dec-a-gon
Plural The plural of undecagon is undecagons.
Total letters 9
Vogais (4) u,e,a,o
Consonants (4) n,d,c,g

What is an Undecagon?

An undecagon is a geometric shape that has eleven sides and eleven angles. It is also known as an 11-gon. The prefix "undec-" is derived from the Latin word "undecim," which means eleven.

Properties of an Undecagon

An undecagon has a total of 11 diagonals, where each diagonal connects one vertex of the undecagon to another, non-adjacent vertex. The sum of all the internal angles in an undecagon is equal to 1620 degrees. The formula to calculate the number of diagonals in an undecagon is given by [n(n-3)] / 2, where n represents the number of sides.

Construction of an Undecagon

Constructing a regular undecagon using a compass and a straightedge is possible. To construct a regular polygon, the center and radius of a circle are determined using the compass. The sides of the undecagon are drawn by connecting the points on the circle, ensuring that the distance between each point is equal.

Applications of Undecagons

Though undecagons may not be as common as triangles, squares, or other regular polygons, they find applications in various fields such as architecture, art, and design. The unique properties of undecagons make them interesting shapes to work with and explore in mathematical contexts.

Overall, undecagons are fascinating geometric shapes with distinct properties that set them apart from other polygons. Their construction and applications add depth to the study of geometry and provide insights into the intricate world of mathematical shapes.


Undecagon Examples

  1. The playground features a colorful undecagon-shaped structure.
  2. She drew an undecagon on the chalkboard for the geometry lesson.
  3. The new traffic sign had an undecagon outline to indicate a roundabout ahead.
  4. The cake was decorated with an undecagon pattern made of frosting.
  5. The garden had a series of undecagon-shaped flower beds arranged in a spiral.
  6. The artist created a stunning painting featuring an undecagon as the focal point.
  7. The architectural plans included an undecagon-shaped atrium in the center of the building.
  8. The medal awarded to the champion had an undecagon design around the edge.
  9. The festival grounds were marked with undecagon flags to guide visitors to different areas.
  10. The company logo was inspired by the shape of an undecagon for its unique and modern look.


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  • Updated 30/03/2024 - 16:02:36