We present some experiments with pre-service and in-service math teachers which show how the use of a good drawing with a dynamical geometry system sometimes "hides" some evident properties and therefore induces to miss some conjectures and to produce "proofs" with bugs.

Making bad conjectures and incomplete proofs with good drawings within a dynamic geometry environment

ACCASCINA, Giuseppe;ROGORA, Enrico
2005

Abstract

We present some experiments with pre-service and in-service math teachers which show how the use of a good drawing with a dynamical geometry system sometimes "hides" some evident properties and therefore induces to miss some conjectures and to produce "proofs" with bugs.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/187156
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