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ERIC Number: EJ859717
Record Type: Journal
Publication Date: 2009-Jan
Pages: 3
Abstractor: ERIC
ISSN: ISSN-0025-5785
Polygons and Their Circles
Stephenson, Paul
Mathematics Teaching, n212 p35-37 Jan 2009
In order to find its circumference, Archimedes famously boxed the circle between two polygons. Ending the first of a series of articles (MT179) with an aside, Francis Lopez-Real reverses the situation to ask: Which polygons can be boxed between two circles? (The official term for such polygons is "bicentric".) The sides of these polygons are tangential to the inner circle (they are "tangential" polygons) and their vertices lie on the outer one (they are "cyclic" polygons). In this article, the author continues exploring with Lopez-Real's cyclic and tangential polygons. (Contains 3 figures, 1 table and 1 note.)
Association of Teachers of Mathematics. Unit 7 Prime Industrial Park, Shaftesbury Street, Derby, DE23 8YB, UK. Tel: +44-1332-346599; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A