Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 31
22 MECHANICAL DRA WING. … Extend BA^ and with^ as centre andAB as radius describe a semi-circle. Dividethe semi-circle into as many equal parts asthere are sides in the required polygon, anddraw from A to the second point, a secondside of the polygon. Bisect A 2 and AB;the bisectors meet at 7, the centre of therequired…
Mechanical drawing
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
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