A jumbling-only puzzle with a weird axis system and a somewhat regular shape.

• Inventor: Oskar van Deventer
• Mechanism: Jumbling only axis system (other)
• Patents: Unknown
• Producer: 3D printing service
• Year: 2011
• Original Price: $0.00 USD
• Current Price: No Data

PentaJumble is based on a geometry that was suggested by Bram Cohen. The puzzle's shape consists of four pentagons and four trapezoids. The solids symmetry group is D2d which is of size eight. The solids dual polyhedron is very similar to the Snub disphenoid, a Johnson solid.
The four pentagons can be rotated. The puzzle allows only jumbling turns, which causes some strange bandaging. The puzzle has all kinds of weird geometric properties. For starters, all edges can be interchanged. Moreover, there are many different ways to assemble the puzzle, such that it has the same outer shape, but different different positions of the little wedge-triangles.
Edge length: 51 mm (pentagon)
Edge length: 33 mm (shortest)
Weight: 104 grams

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