Decagon Area Calculator
MathCalculate the area of a regular decagon from its side length.
Area
Area of the regular decagon.
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Odeh Ahwal0people find this calculator helpful
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Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
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Frequently Asked Questions
What is the decagon area formula?
Area equals 10 times the side length squared, divided by 4 times the tangent of pi over 10, which works out to approximately 7.694 times the side length squared.
Does this work for an irregular decagon?
No, this formula assumes a regular decagon with all 10 sides and angles equal. An irregular decagon needs its area calculated from vertex coordinates instead, for example with the shoelace formula.
How does decagon area compare to a circle of the same width?
A regular decagon's area gets progressively closer to that of its circumscribed circle as the number of sides increases; a decagon already approximates a circle fairly closely compared to shapes with fewer sides like a pentagon or hexagon.
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