Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 25
Problem 18. — To construct a regular octagonwithin a given square ABCD. Draw the diagonals of the square, whichintersect at its centre, z, and with points A, B,C, and D as centres and a radius, A /, equal tohalf the diagonal, describe arcs intersecting thesides of the square in points 2, j, <?,…
Mechanical drawing
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-79-175.webp)
