A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 55
scribe the cir-cle ^ 7 CD. Draw the two diam-eters D 7 and A C at right anglesto each other. Divide the diam-eter D 7 into as many equal partsas the poh-gon has sides (in thiscase seven). Prolong the diam-eter A C and make 3A equal tothree-fourths of the radius OA.Through -5 and 2^ the second… … The § 13 GEOMETRICAL DRAWING 41
