Hooke’s Joint Flexagons

I’ve added a sub page on Hooke’s joint flexagons. Hooke’s joint flexagons were first described by Engel, who calls them ‘hybrid flexagons’, but ‘Hooke’s joint flexagons’ is more apposite. The characteristic feature of a Hooke’s joint flexagon is that adjacent leaves are hinged to either face of an ‘intermediate leaf’’ The hinges are at right angles so the intermediate leaf is a Hooke’s joint.

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