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 128
mean proportional between the lines EA and AB. Join AD,Make AL equal to AK, Draw LIST perpendicular to AB till itmeets AD in K From N draw NM parallel to AL, ALNMis the rectangle required. Peoblem 150, To construct a regiilar polygon three-fourths the area of a similarpolygon, e.g. a hexagon. … Fig. 233.Let ABCDEF be the given hexagon. Produce AB to H, io8 PRACTICAL PLANE GEOMETRY CHAP. making BH equal to three-fourths of AB (Prob. 10). BisectAH (Prob. 1), and from its centre describe the semicircle AKH.Draw BK—the mean proportional between AB and BH—per-pendicular to AB. Join the points…
Geometrical drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
