How to teach paper-folding and cutting: a practical manual-training aid (1892)
[Litchfield, Norma MacLeod] [from old catalog] · Lebanon, Ohio, March brothers · leaf 21
% Ho. /3 designs, and the terms aaite and obtuse may be usedto designate the angles in them. In talking of draw-ing the lines, use the terms oblique^ vertical^ and /<?;--pendicular until the children can distinguish them ata glance. In figure No. 18 a chance occurs to teachthe term octagon, also…
Paper work
Internet Archive · Library of Congress · 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-151-377.webp)