Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 46
,and radius equal to EF, markoff G on EA produced. WithG as centre, and radius equal toAC, set off H on circumference;join AH ; AH is a side of anoctagon. With D and E ascentres, and radius equal toDC, set off the points I and J oncircumference ; join ID ; ID isa side of a duodecagon. WithCG as… … Approximate Constructions, 39 42. 39. To inscribe any regular polygon in a given circle;for example, a heptagon. Describe a circle, and draw the diameter AB. Divide AB POLYGONS. 33 into as many equal divisions as there are sides to the polygon(in this instance seven). WithA and B as centres, and…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Brief synopsis of the course of lectures in descriptive geometry; as arranged for the first year Faculty of Applied Science and Engineering, University of Toronto. [By] J. Roy Cockburn (1922)](https://img.insideoutlibrary.com/img/200/ia-fybriefsynopsiso00cockuoft-27-24.webp)
