A collection of four Geogebra files from Greg Bland that will help students understand conics.
Geogebra is a fantastic FREE dynamic geometry program that can be downloaded from
Not an interactive digital resource, but a very useful resource for teaching conics nonetheless. From Lou Talman.
Given isosceles triangle OAP on a coordinate plane, where O is the origin, A lies on the positive x-axis and P is a point in quadrant I. What is the locus of P such that triangle OAP always has an area of 12 square units?
This animation from Lou Talman show how a planar wave-front entering a parabolic reflector is reflected to the focus of the parabola.
This animation from Lou Talman demonstrates the reflection property of the ellipse.
This animation from Lou Talman shows how to use the definition of ellipse to trace out such a curve
This lovely animation from Lou Talman shows how a plane intersects a cone to form the curves traditionally known as the "conic sections," - ellipses, parabolae, and hyperbolae.