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GeoGebraGeoGebra Classroom

Exploring Conic Sections

STUDENTS:

Explore the following applet. Follow the instructions given in the questions to answer the questions located below this applet.

1.

Note the equation of the plane is z = some constant. Change the equation of this yellow plane to z = 2. Then change it to z = 1. Then change it to z = 4. How would you describe the intersection of this plane and double-napped cone?

2.

Change the equation of the plane to . How would you describe the intersection of this plane and double-napped cone now?

3.

Change the equation of the plane to . How would you describe the intersection of this plane and double-napped cone now?

4.

Change the equation of the plane to . How would you describe the intersection of this plane and double-napped cone now?