Electronic Proceedings of the Sixteenth Annual International Conference on Technology in Collegiate Mathematics

Chicago, Illinois, October 30-November 2, 2003

Paper C020

Going In Circles with Sketchpad

Carol A. Marinas

Math/Computer Science
Barry University
11300 NE 2nd Avenue
Miami, FL 33161
Phone: (305) 899-3617

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Geometer's Sketchpad has been an interactive program to create meaning in geometry for a decade. It has mainly been used at the high school and college level but I feel should be introduced in elementary and middle school.

In particular, middle school students can move from concrete examples of shapes to more abstract representations with Sketchpad. Through guided activities students can learn about the Sketchpad tools, observe geometric relationships, and develop conjectures.

The guided activities about circles start with the meaning of a circle (Figure 1) and then progress to relationships between angles and arcs (Figures 3-6).

Keyword(s): geometry, Geometer's Sketchpad