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An ellipse is born
Author:
Dave Van Leeuwen
Topic:
Ellipse
This starts with two concentric circles, and breaks the creation of an ellipse into a few key steps.
GeoGebra
New Resources
Napoleon's Theorem
Ellipse as Envelope - Correspondence Method
Slope of a Straight Line: Run and Rise
"Compressed" Astroid as Envelope
Stairs (Optical Illusion)
Discover Resources
Constructing Dialations. -Ashley, Alanis
Nirode Quads from Quads
Parallel Lines
INZENTROA
Constructing π from a regular star-12-gon
Discover Topics
Indefinite Integral
Solids or 3D Shapes
Means
Symmetry
Conditional Probability