Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 27
By- Fig. 27. Let a and I be the given points equally distant from the vertex A. Drawa perpendicular to A C at a, and to A B at h. The intersection of these per-pendiculars will be the centre of the required circle. In the same figure, to find the cent^^e^-jthe^ radius being given, and thepoints a…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![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-31-34.webp)
