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Khan Academy
Khan Academy: Algebra: Conic Sections: Proof: Hyperbola Foci
A video lesson giving an algebraic proof of the formula for the foci of a hyperbola. [14:50]
Khan Academy
Khan Academy: Algebra: Conic Sections: Foci of a Hyperbola
A video lesson exploring the foci of a hyperbola. The formula for finding the foci is derived algebraically and then applied to a specific hyperbola equation. Shows that the foci of a hyperbola relate closely to the foci of an ellipse....
Khan Academy
Khan Academy: Hyperbolas: Foci of a Hyperbola
Watch a short video for explore the foci of a hyperbola.