This Area of a Decagon formula, (Adecagon=5/2 • √(5+2√5) • s2), computes the area of a regular decagon, a polygon with 10 equal sides of length (s). Regular Decagon
Choose your length units (e.g. feet, meters or even angstrom or light-years), and then enter the following:
Area is calculated in square meters. However, you can automatically convert the area to other area units such as square feet or acres via the pull-down menu.
For the CLICK HERE.shaped column,
A regular decagon has ten equal sides and equal angles.