Curves from Geometry

Take a another look at ellipses. The seventh segment in a series of 23 in a Precalculus module continues to investigate the graph and equation of an ellipse from the previous instructional activity. Scholars investigate the fact that the sum of distances from the foci to an ellipse is constant. Learners then develop equations and graph ellipses given the foci.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Have class members create ellipses using string attached at two points
  • Ask the class to come up with an explanation of when an ellipse will become a circle
Classroom Considerations
  • Requires the use of the distance formula
Pros
  • Includes answer keys for easier grading
  • Provides an exit ticket to check understanding
Cons
  • None
Common Core