A History of Folding in Mathematics by Michael Friedman

Author:Michael Friedman
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

This is indeed to reverse the process of Euclid’s Elements, which begins with the point as the basic element. Rao there requests from every teacher “to provide himself with a box of solids containing […] the five Platonic bodies, and the several varieties of the pyramid and the prism. Most of these are found among the Kindergarten Gifts […].”539 This is the first time (but not the last) that the expression “Kindergarten Gifts” is mentioned. The name Fröbel, on the other hand, goes entirely unmentioned.

It should be stressed that this is no accident: in order to facilitate the reception of the Fröbelian methods, a direct association with Fröbel himself was usually omitted when introducing them. This could already be seen in England and was easily noticeable in India, as the name Fröbel eventually became obscure there.540

The first construction that Rao instructs the teacher to demonstrate is the construction of “the regular tetrahedron with paste-board,”541 by drawing a net of triangles and then folding it. The other Platonic solids are also folded through use of the regular nets (see Fig. 4.61).

Fig. 4.61Rao’s drawings (Rao 1888, p. vi) of the various nets to be folded

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