Hectogon

File:Hectagon.png

A hectogon

A hectogon or hectagon is a shape with 100 sides and 100 corners.

Regular hectogon

All sides of a regular hectogon are the same length. Each corner is 176.4°. All corners added together equal 17640°.

Area

The area of a regular hectogon of side length a is given by

[math]\displaystyle{ A = 25a^2 \cot \frac{\pi}{100} \simeq 795.513 a^2 }[/math]

Hectogon Media

• Assorted polygons.svg

  Some polygons of different kinds: open (excluding its boundary), boundary only (excluding interior), closed (including both boundary and interior), and self-intersecting.

• Polygon types.svg

  Some different types of polygon

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  Partitioning an n-gon into n − 2 triangles

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  Coordinates of a non-convex pentagon

• Historical image of polygons (1699)

• Giants causeway closeup.jpg

  The Giant's Causeway, in Northern Ireland