Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 274
er. If this triangular section were rotated onthe line op it would meet OB in §. SPHERICAL TRIANGLES 253 This section could also be obtained by first drawing the lineop at right angles to the projection of OB, and then drawingtlie lines om and p)n- perpendicular to OB and OB. Problem 44. The two… … Fi?. 59. ^r-~. :X OB, OC, and OA. These represent the two given sides lying 254 SOLID GEOMETRY • chap. flat upon the same plane. ISTow rotate the side a on the lineOC till it makes with & the given angle C. Take any point d,and draw dc at right angles to OC, and at cj construct the givenangle 0…
Geometrical drawing
Internet Archive · Wellesley College Library · 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-129-355.webp)
