# When Two Circles Determine a Triangle. Discovering and Proving a Geometrical Condition in a Computer Environment

When Two Circles Determine a Triangle. Discovering and Proving a Geometrical Condition in a... Visualization of mathematical relationships enables students to formulate conjectures as well as to search for mathematical arguments to support these conjectures. In this project students are asked to discover the sufficient and necessary condition so that two circles form the circumscribed and inscribed circle of a triangle and investigate how this condition effects the type of triangle in general and its perimeter in particular. Its open-ended form of the task is a departure from the usual phrasing of textbook’s exercises “show that…”. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Technology, Knowledge and Learning" Springer Journals

# When Two Circles Determine a Triangle. Discovering and Proving a Geometrical Condition in a Computer Environment

, Volume 15 (1) – Mar 29, 2009
9 pages

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Publisher
Springer Journals
Subject
Education; Learning and Instruction; Mathematics Education; Educational Technology; Science Education; Creativity and Arts Education
ISSN
2211-1662
eISSN
1573-1766
DOI
10.1007/s10758-009-9146-x
Publisher site
See Article on Publisher Site

### Abstract

Visualization of mathematical relationships enables students to formulate conjectures as well as to search for mathematical arguments to support these conjectures. In this project students are asked to discover the sufficient and necessary condition so that two circles form the circumscribed and inscribed circle of a triangle and investigate how this condition effects the type of triangle in general and its perimeter in particular. Its open-ended form of the task is a departure from the usual phrasing of textbook’s exercises “show that…”.

### Journal

"Technology, Knowledge and Learning"Springer Journals

Published: Mar 29, 2009

### References

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