Acronym | ditti |
Name |
ditrigonal icosahedron, vertex figure of idhi |
© | |
Circumradius | sqrt[(9+3 sqrt(5))/8] = 1.401259 |
Dual | (selfdual) |
Confer | |
External links |
Ditti is a self-dual noble polyhedron with 2 types of edges of size x = 1 (those of the doe hull) and those of size F = ff = f+x = (3+sqrt(5))/2 = 2.618034 (of the vertex inscribed F-gissid). Its faces are propeller tripods or concave ditrigons of form (-x)3F.
From the picture or the just mentioned hull it becomes obvious that it is a faceting of doe. But as the long edges describe a gissid and that one in turn is an edge-stellation of ike, together with the fact that the central triangle of the propeller tripod faces outlines just the faces of this ike, it becomes obvious that it also is a face-stellation (greatening) of this ike as well.
20 | 3 3 | 6 ---+-------+--- 2 | 30 * | 2 x 2 | * 30 | 2 F ---+-------+--- 6 | 3 3 | 20 (-x)3F
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