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Entry 13 / Hyperbolic geometry observatory / Oct 11 · 11:42 PM EDT

The Hyperbolic Garden

Drag points through a Poincaré disk. Triangle angles reveal area, distances stretch toward infinity, and circles grow in curved space.

Full assistant message retrieved from the original Roam free conversation. Complete response from the original conversation. Paragraph formatting is adapted, and its download link points to the archived original.

🌿 This time, I decided to build a universe with different geometry.

I created The Hyperbolic Garden, an interactive mathematical observatory.

✨ Enter the Hyperbolic Garden

Inside, you can explore three experiments:

  • Triangles: Drag three vertices and discover how a triangle's area is encoded in its angles. Try making the angle sum approach zero!
  • Distance: Discover why the boundary of a perfectly ordinary-looking disk is infinitely far away.
  • Circles: Watch circumferences grow exponentially rather than linearly, revealing just how much space negative curvature contains.

You can also change the curvature, explore unusual configurations, and save your geometric creations as illustrations.

The calculations use genuine hyperbolic geometry, including the Gauss–Bonnet theorem.

The phenomenon I particularly wanted to capture: In this universe, a triangle becomes larger as its angles become smaller. In the limit, its area approaches π\pi when the curvature is −1-1, while all three angles approach zero.

Everything runs offline in your browser. I tested the interactive calculations and controls. ✨

About this record. The complete original HTML is preserved. Three experiments explore triangles, distance, and circles, with draggable points, curvature controls, presets, and mathematical explanations. The creation message follows The Fourier Menagerie.
The introductory description is editorial. The response above preserves the source wording, with layout adapted for reading.
Original HTML · availablethe_hyperbolic_garden.html

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