Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 122
case)into six equal parts. Take centre 0, and join any two, as OA,OB ; bisect the angle AOB by OE, and at E draw a tangentCD ; produce OA and OB to meet the tangent in C and D. GEOMETRICAL DRAWING. 119 Bisect the angles at C and D by CF and DF, meeting at F ;then with centre O and distance OF… … Fig. 88. Let AB be the given line, produce it both ways; then withcentre A and distance AB, describe the semicircle DEB,describe also a similar semicircle AFC. Divide the circumfer-ence DEB into as many equal parts as the polygon is to havesides (in this case five), and join A with the second point…
Geometrical drawing · Perspective
Internet Archive · Western University Libraries · 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-127-351.webp)
