Semi-Ellipse Shape

The required input to define the size of a Semi-Elliptical Arch is simply its Height or Rise (H). Unique to this arch shape is that characteristic that at its widest dimension, at its base, the width is equal to its height (H). The shape is geometrically defined with the function of an ellipsis, where the traditional elliptical coefficients of A and B respectively correspond to H/2 and H.