Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 48
. 41. On a given line AB, to describe a regular polygon;for example, a heptagon. Produce AB to C. With A as centre, and AB as radius, describe a semicircle, anddivide it into as many equaldivisions as there are sides tothe polygon (in this instanceseven). Join A with the seconddivision from C in… … 42. On a given line AB, to describe a regular polygon (second method) ; for example, a pentagon. At point B erect a perpendicular equal to AB. With B as centre, and radius BA, draw thequadrant AC, and divide it intoas many equal divisions asthere are sides to the polygon(in this case five). Join…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
