Discovering Ellipses w/string

Forums Main Page Forums Main Page Precalculus Conic Sections Ellipses Discovering Ellipses w/string

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      The lesson in the attached word doc allows for students to discover the relationship of an ellipses foci by drawing their own ellipses by using a string attached at the two focal points as their compass. They then derive the formula for the ellipse itself. This lesson is a fantastic supplemental lesson to ellipses, and I’ve found it better do it after they’ve already learned the basics of how to graph ellipses algebraic/graphically.

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