focus   4 videos

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  Focus and Directrix of a Parabola

  Algebra 2 Quadratic Equations and Inequalities

  How to define the focus and directrix of a parabola.

  focus directrix parabola vertex
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  The Hyperbola

  Algebra 2 Conic Sections

  How to talk about hyperbolas.

  hyperbola vertices co vertices transverse conjugate focus
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  Conic Section Formulas

  Algebra 2 Conic Sections

  How to identify a conic section by its formula.

  parabola circle ellipse hyperbola center focus
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  The Ellipse

  Algebra 2 Conic Sections

  All about ellipses.

  ellipse co vertices vertices major axis minor axis focus foci x radius y radius