Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 23
Problem 11. — To trisect a right angle, C With A as centre and any radius, describe t^ ^ intersecting ^C in z and AB in 2. With / and2 as centres and the same radius intersect the arcin J and 4. Join A 4 and Aj. Problem 12.— To construct at E, in the line E D,cCn angle €qual to a given angle, ABC.…
Mechanical drawing
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
