The ancient Greek mathematician Archimedes enumerated the eighteen regular and semi-regular solids, and they are known as Archimedean solids in his honor.
The faces of this white cut and glued plastic model are twelve regular pentagons and twenty equilateral triangles A mark on the object reads: 14 (/) AIX. It is an Archimedean solid, number IX among Wheeler's Archimedean solids and number 14 in his general list of models.
Compare MA.304723.058, MA.304723.436, MA.304723.448, and MA.304723.465.
Reference:
Magnus J. Wenninger, Polyhedron Models, Cambridge: The University Press, 1971, p. 26
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