Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 45
sect AB in E.Draw line DE. With C as center and DE as radius, cut offarc I on the semicircle. Draw line B\ ; it is a second side ofthe heptagon. Bisect it and obtain the center of the circum-scribing circle as in the preceding problem. Fig*.15 Hi To Inscribe an Octagon in a GivenSquare.—Draw… … 8 / < > \ i E F f \ / ^ Fig. 46. Fig. 47- Fig.b* I?. To Construct a Regular Octagon on aGiven Line AB.—Extend line AB in both directions. Erectperpendiculars at A and B. With centers A and B and radiusAB describe the semicircle CEB and AF2. Bisect the quad-rants CE and DF in 1 and 2, then A\…
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