How to teach paper-folding and cutting: a practical manual-training aid (1892)
[Litchfield, Norma MacLeod] [from old catalog] · Lebanon, Ohio, March brothers · leaf 84
he length of the sides of thepyramid. Then with a radius equal to the length ofthe line describe an arc of considerable length, asshown by C-D. Examine illustration No. 120 andyou will see what the next steps are. Decide howwide the triangular sides of the pyramid are to be at SOLID FORMS. 8l their… … same radius, draw two more arcs and connect thepoints so formed by straight lines with point A.Draw straight lines from point to point for the basesof the triangles, and you then have the plan for thefour sides of your pyramid. For the base of thepyramid select the base of either triangle and…
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