"Area and Perimeter of Regular Polygon
'<hr /><div style="max-width:110mm;"><img style="height:70pt;" class="side" alt="polygon.png" src="https://calcpad.eu/media/math/area/polygon.png"></div>
'Number of sides -'n = ?
'Side length -'a = ?
'Area
α = 180/n'&deg;
A = a^2*n/4*cot(α)
'Perimeter
P = n*a
'8	1