Tridecagon facts for kids
A tridecagon is a special shape. It has 13 straight sides and 13 corners. You might also hear it called a trikaidecagon or a 13-gon. It's a type of polygon, which is a flat shape made of straight lines.
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What is a Regular Tridecagon?
A regular tridecagon is a very balanced shape. This means all its 13 sides are exactly the same length. Also, all its 13 corners (or angles) are the same size. Each corner in a regular tridecagon measures about 147.27 degrees. If you add up all the angles inside a regular tridecagon, they will total 1980 degrees.
How to Find the Area
The area of a shape is the amount of flat space it covers. For a regular tridecagon, you can find its area if you know the length of one of its sides. Let's call the side length a.
Tridecagons in Real Life
You might not see tridecagons every day, but they are used in some interesting places!
Coins
One cool example is the Czech 20 korun coin. This coin is shaped like a regular tridecagon.
Related Topics
- Triskaidekaphobia: This is the fear of the number 13. It's interesting because a tridecagon has 13 sides!
Images for kids
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An approximate tridecagon drawn inside a circle.
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See how a tridecagon can be drawn step-by-step.
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This image shows the different ways a regular tridecagon can be symmetrical.
See also
In Spanish: Tridecágono para niños
