Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 43
Fig. 42. … Ffs.b* 43 To Construct a Regular Octagon, theCircumscribing Circle being given.—Draw a diameterAB. Bisect the arcs AB in C and D. Bisect arcs CA andCB in 1 and 2. Draw lines from 1 and 2 through the centerof the circle, cutting the circumference in 3 and 4. Join A\,iC, C2, 2£t i?3, etc. Ffgb* U To…
