Manual of cardboard construction for third, fourth, and fifth grades (1902)
Kunou, C. A. (Charles A.) · Los Angeles : Los Angeles City Public Schools · leaf 43
line A, B, 3, and on it with compasses construct equilateral triangles, above and below.On the sdes of triangle C construct triangles D, E.At middle points of sides, draw perpendiculars i^, and draw slanting lines, as in drawing.Draw flap lines I/2 below triangles.Score and fold on dashed lines as… … 38
Paper work
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
