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ERIC Number: EJ784595
Record Type: Journal
Publication Date: 2008-Jan
Pages: 2
Abstractor: ERIC
Reference Count: 0
ISSN: ISSN-0025-5785
Journey to the Centre of a Triangle
Jones, Margaret
Mathematics Teaching Incorporating Micromath, n206 p4-5 Jan 2008
Using the film "Journey to the Centre of a Triangle" with a group of 15-year-old pupils, the author describes how they had done some work on constructions such as angle bisector and perpendicular bisector. The pupils were given A3 papers, rulers, compasses and pencils and they were asked to recreate their favourite scence from the film. The film identified four centres: (1) the incenter; (2) the orthocenter; (3) the centroid; and (4) the circumcenter. There is a power in construction that means one has to think when using pencil, compass and ruler, but today's tools are the software packs such as "Geometer's Sketchpad" and "Cabri." In this article, the author compares working with a moving film to working with software tools. (Contains 4 figures 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 - Evaluative
Education Level: High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A