# Geometrical functions: tools in GeoGebra

```@article{Sangwin2008GeometricalFT,
title={Geometrical functions: tools in GeoGebra},
author={C. Sangwin},
journal={MSOR connections},
year={2008},
volume={8},
pages={18-20}
}```
• C. Sangwin
• Published 2008
• Computer Science
• MSOR connections
When I read this, I was rather surprised that Hardy took a somewhat more liberal view of the idea of a function than we commonly do today. He gives a number of further examples, some of which involve formulae, an equation or algebraic expression in x and y, including an infinite series. Others involve a relationship between x and y which follow from some geometrical construction. In this article, I’d like to give some examples of geometrical functions as illustrated by the software GeoGebra.
4 Citations

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