Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 32
Fig. 45. Fig. 46. 2d Method (Fig. 47).—Draw a base line, as before, equal to A B. At oneextremity construct an angle equal to C A B, and at the other an angle equalto 0 B A. The sides of these angles will intersect, and form the requiredtriangle. Sd Method (Fig. 48).—Construct an angle of the…
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-84-119.webp)
