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 106
ob. 1).With D as centre, and DB asradius, draw the arc cutting CAproduced in E. With A ascentre, and AE as radius, draw £the arc cutting AB in F. ThenAB : AF : : AF : BF. Fio-. 190. Problem 118. To divide any straight line AB in the point C, so thatAC:CB::3 :4. At A draw the line AD ofindefinite… … Problem 119. To construct a triangle on a given line AB, so that the threeangles may he in the proportion o/ 2 : 3 : 4. From B, with any radius, describe a semicircle and divide itinto nine equal parts (Prob. 15). Draw the lines B4 and B7. 86 PRACTICAL PLANE GEOMETRY Then the three angles 7BC, 4B7,…
Geometrical drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
