Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 35
same way, a circle may be described about a rectangle.• To inscribe a circle in a square; and to describe a square about a circle(Fig. 62). To inscribe the circle. Draw the diagonals A B, C D, of the given square,cutting at E; draw the perpendicular E F to one of the sides, and with theradius E F,… … and produce them; bisect the angle D E B at the centre by the diameter F G-,and through F and Gr draw perpendiculars A 0; B D, and join the points A, D^B, 0, where they cut the diagonals, to complete the square. To inscribe a pentagon in a circle (Fig. 63). Draw two diameters, A C, B D, at right…
Mechanical drawing
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-94-179.webp)
