"Area and Perimeter of Trapezoid
'<hr /><div style="max-width:90mm;"><img style="height:60pt;" class="side" alt="trapezoid.png" src="https://calcpad.eu/media/math/area/trapezoid.png"></div>
'Base lengths
a = ?','b = ?
'Height
h = ?
'Area
A = (a+b)*h/2
'Perimeter (symmetrical figure only)
c = sqr(h^2 + (a - b)^2/4)
P = a+b + 2*c
'2	1	1