How to teach paper-folding and cutting: a practical manual-training aid (1892)
[Litchfield, Norma MacLeod] [from old catalog] · Lebanon, Ohio, March brothers · leaf 18
FTg.. M.. 9 taught that its four corners are called right angles.After folding three times a three-sided figure is … Fig. No. Id iU PAPER-FOLDING AND CUTTING.
Paper work
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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