Constructions of surfaces with Cabri II Plus
JeanJacques Dahan
jjdahan@wanadoo.fr
Mathematic and Informatic Grp
Institute of Research for MathematicsTeaching
France
Abstract
The new tools of Cabri II Plus "Expression",
"Evaluate an expression" and the new ability to draw loci of
loci permit us to draw surfaces given with z = f(x;y). We will see how
to construct sections to planes xoz and yoz to get a nice representation
of any function of two variables. We will remind how to draw the tangent
line to the curve of a function of one variable to show after how it is
possible to represent tangent planes. We will treat also the special case
of spheres. The representations we will use are the parallel perspective
and the military perspective.
