Frederickson's Second Dissection of an Octagon to Five Octagons
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This Demonstration shows Frederickson's second dissection of a regular octagon into five congruent regular octagons.
Contributed by: Izidor Hafner (July 2016)
Open content licensed under CC BY-NC-SA
 G. N. Frederickson, Hinged Dissections: Swinging & Twisting, Cambridge: Cambridge University Press, 2002 pp. 169–170.