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ERIC Number: EJ926903
Record Type: Journal
Publication Date: 2011-Mar
Pages: 2
Abstractor: As Provided
Reference Count: 1
ISSN: ISSN-0031-921X
The Area of a Circle
Greenslade, Thomas B., Jr.
Physics Teacher, v49 n3 p160-161 Mar 2011
The geometrical shapes in Fig. 1 recently came into the Greenslade Collection. The semi-triangular pieces of wood looked like slices from a pie, each 22.5 degrees in angular width. They were tied together with a thin leather band tacked around their curved surfaces. What is this apparatus?
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A