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`A = 11/4 * ( "s" )^2 * cot(pi/11)`
Enter a value for all fields
The Area of a Hendecagon calculator computes the area of a regular hendecagon, a polygon with 11 equal sides of length (s). 
INSTRUCTIONS: Choose units and enter the following:
- (s) - This is the length of the sides of the hendecagon
Area of a Hendecagon (A): The area (A) is computed in square meters. However, the area can be automatically converted to many other area units (e.g. acres) via the pull-down menu.
For the Volume of a Hendecagon shaped column, CLICK HERE.
The Math
A regular hendecagon has eleven equal sides and equal angles. The formula for the area of a hendecagon is as follows:
where s is the length of a side.
A regular hendecagon has eleven equal sides and equal angles. For computational performance, `11/4 * cot(pi/11)` is approximated to be 9.365639907.
For other area calculators, see the following:
- Area of a Circle - Multiple functions to compute the area of a circle or portions of a circle.
- Area of Triangle - Three Sides
- Area of Quadrilateral - Four Sides
- Area of Pentagon - Five Sides
- Area of Hexagon - Six Sides
- Area of Heptagon - Seven Sides
- Area of Octagon - Eight Sides
- Area of Nonagon - Nine Sides
- Area of Decagon - Ten Sides
- Area of Hendecagon - Eleven Sides
- Area of Dodecagon - Twelve Sides
- Area of Polygon - Any number of sides (n).