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GeoGebra
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z = xy-y^2
Author:
Steve Phelps
The surface
with the tangent plane at
.
GeoGebra
New Resources
Angles and Intersecting Lines: Quick Investigation
Isosceles Triangle: Quick Construction
Ellipse, Hyperbola and Circle as Envelopes
Witch of Agnesi - A Classical Construction
van Aubel's Theorem
Discover Resources
Borderline Hunter
Angle Bisectors of a Triangle
example
Optimizing Volume & Surface Area of a Cylinder
Four bar linkage
Discover Topics
Planes
Curve Sketching
Complex Numbers
Parabola
Translation