My mathematician husband pointed this out to me: https://math.stackexchange.com/questions/2410516/regular-pentagon-from-a-square-paper
NB The lack of color contrast on the original poster's diagrams makes them very hard to read. The reply by grand-chat gives much clearer diagrams. Karen Reeds, co-ringleader, Princeton Public Library Origami Group Affiliate of Origami USA, http://origamiusa.org/ We usually meet 2nd Wednesday of the month, 6:30-8pm, First Floor, Quiet Room. Free! We provide paper! All welcome! (Kids under 8, please bring a grown-up.) Princeton Public Library info: 609.924.9529 https://princetonlibrary.org/ Celebrating 11 years of paperfolding in Princeton! Our next meeting: Wednesday, October 11, 2017. from Karen Reeds karenmre...@gmail.com
