I'm not entirely sure, but I don't think that is a dodecahedron. It may be an icosahedron. The model could be the stellated icosahedron shown on this page: https://www.origami-resource-center.com/polyhedra-origami.html
If I recall correctly, Gay Merrill Gross also has a single sheet icosahedron which you can see on the front cover of this book: https://www.amazon.com/Art-Origami-Gay-Merrill-Gross/dp/0792458419/ref=sr_1_1?ie=UTF8&qid=1521397112&sr=8-1&keywords=the+art+of+origami+merrill This particular model is fun because it is a "trick" icosahedron. It is imbalanced so it can be made to appear as if it rolls erratically by itself. Diana ---------------------------------------------------------- http://www.origami-resource-center.com/ http://make-origami.com ----------------------------------------------------------
