Blackboard Hemisphere

P.I.R.A. #: 1A 30.41

Demonstrates: Non-Euclidean geometry.

Description: 24" black sphere with stand.

Click to Enlarge Image

Quicktime Video
Condition: Good. Size: 24" Hazard: None.

Instructions: Draw triangle on sphere.
Items Used: Blackboard hemisphere, chalk.
Notes: Clean after use. Bulky to move.
Schematic: none. Tech Specs (PDF format): none.
Mathematical Description / Measured Results:

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


History: Denoyer-Geppert: www.denoyer.com