Et primum genus distribuitur, uti, longitudo cum in quinque partes divisa fuerit, tres partes latitudini dentur; alterum, cum in tres partes dividatur, duae partes latitudini tribuantur; tertium, uti latitudo in quadrato paribus lateribus describatur inque eo quadrato diagonius linea ducatur, et quantum spatium habuerit ea linea diagonii, tanta longitudo atrio detur.
The first arrangement is to divide the length into five parts, and to give three of these to the width; the second divides the length into three parts and assigns two to the width; in the third arrangement a square is described upon the width, and the diagonal of the square is drawn: whatever is the size of the diagonal supplies the length of the atrium.
final_alignments\Vitruvius_Architecture_Book_6.json