Online geometry tutor
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Apollonius of Perga 262BC - 190BC,
Greek mathematician of the Alexandrian school, made historical
contributions to mathematics, astronomy and ballistics. His
famous book Conics introduced the terms parabola, ellipse and hyperbola.
According to Pappus, the Apollonian problem was included in his
treatise De Tactionibus ("About Tangencies").
I have used
Geometry Expressions to visualize these geometric forms and
check out a variety of conjectures. Geometry Expressions is the
world's first Interactive Symbolic Geometry System. This means:
Geometric figures can be defined by either Symbolic Constraints
or numeric locations.
download Geometry Expressions 1.0 Free Trial. It is a fully
featured 30 day evaluation copy of the software. All
constraints, constructions and measurements are available for
you to use.