Decagon Calculator
MathCalculate the perimeter, area, and radii of a regular decagon from its side length.
Area
Area of the regular decagon.
Perimeter
80.0000
Total perimeter.
Circumcircle Radius
12.9443
Radius of the circle passing through all vertices.
Incircle Radius (Apothem)
12.3107
Radius of the inscribed circle touching all sides.
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Odeh Ahwal0people find this calculator helpful
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Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Math calculators
Frequently Asked Questions
What is a decagon?
A decagon is a 10-sided polygon. A regular decagon has all 10 sides and all 10 interior angles equal.
How is decagon area calculated from side length?
The general regular polygon area formula, n times side squared divided by 4 times the tangent of pi over n, gives approximately 7.694 times the side length squared for a decagon specifically.
What is the interior angle of a regular decagon?
Each interior angle of a regular decagon is 144 degrees, found from the formula (n minus 2) times 180 divided by n, with n equal to 10.
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