"Area and Perimeter of Equilateral Triangle
'<hr /><div style="max-width:110mm;"><img style="height:60pt;" class="side" alt="equilateral-triangle.png" src="https://calcpad.eu/media/math/area/equilateral-triangle.png"></div>
'Side length
a = ?
'Area
A = a^2*sqr(3)/4
'Perimeter
P = 3*a
P = 3*a
P = 3*a
P = 3*a
'1