Blackboard Hypersphere

P.I.R.A. #: 1A 30.42

Demonstrates: Non-Euclidean Geometry.

Description: 24" black sphere with stand.
Click to Enlarge Image
Quicktime Video
Condition: good. Size: 24" x 24" x 24" Hazard: none.

Instructions: Draw triangle on hypersphere.
Items Used: Hypersphere, chaulk.
Notes: Clean after use; heavy.
Schematic: none. Tech Specs (PDF format): none.
Mathematical Description / Measured Results: Sum of angles on triangle are less than 180 degrees.

Web Links: www.cs.unm.edu/~joel/NonEuclid/NonEuclid.html

History: Demo created in-house.