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 93
90 DRAWING. Here CA = AB = AD = AE = 4, EF = FM = 2, GF=Hhence K is centre at intersection of diagonals and HK = GF.(Fig. 53.) Xqte.—The sphere will not touch the P.P. unless HK =KF. Example S.—Draw a cube, edge 4, touching P.P. 4 toright, and in this place a sphere whose radius = 2. Here thesphere… … Fig. 54. Draw cube, and diagonals of those sides, perpendicular toP.P., join intersections, and bisect this horizontal line asshown. The circle drawn on this line as diameter will repre-sent the sphere, and touch the centre of each side. (Fig. 54.) Exercise XIV. (H = 6, L.D. = 4, scale J = l.) 1.…
Geometrical drawing · Perspective
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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-115-308.webp)
