Octadecagon facts for kids
An octadecagon (say "ock-tuh-DEC-uh-gon") is a special kind of shape. It has 18 straight sides and 18 corners. You can also call it an 18-gon.
What is a Regular Octadecagon?
A regular octadecagon is a very balanced shape. This means all of its 18 sides are exactly the same length. Also, all 18 of its corners are the same size. Each corner in a regular octadecagon measures 160 degrees. If you add up all the angles inside, they total 2880 degrees!
How to Find the Area
The area of a shape tells you how much space it covers. For a regular octadecagon, finding its area involves a bit of math. It depends on how long each side is. The longer the sides, the bigger the area will be.
Images for kids
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This animation shows how to draw an octadecagon using a special tool called a tomahawk.
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This picture shows the different ways an octadecagon can be symmetrical. It can be folded or turned and still look the same.
See also
In Spanish: Octodecágono para niños
