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Tag: Geometry

Name: This Weird Pyramid Always Lands on the Same Face, Confirming 40-Year-Old Theory
Uploaded: 2025-07-05T10:14:01+00:00
Channel: Tarun
Description: “Bille” is the first-ever monostable tetrahedron, or a pyramid-like shape with four triangular faces that has one stable resting position. What this means is that Bille, no matter how you throw it and how it lands, will flip back on exactly the same side every single time. In a recent preprint submitted to arXiv, mathematicians

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This Weird Pyramid Always Lands on the Same Face, Confirming 40-Year-Old Theory

July 5, 2025

“Bille” is the first-ever monostable tetrahedron, or a pyramid-like shape with four triangular faces that has one stable resting position. What this means is that Bille, no matter how you throw it and how it lands, will flip back on exactly the same side every single time. In a recent preprint submitted to arXiv, mathematicians […]