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Focus and directrix introduction | Conic sections | Algebra II | Khan Academy (Khan Academy) View |
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Focus Point of a Parabola (MathSux) View |
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Parabola Find Vertex, Focus, Directrix, and Graph (Mario's Math Tutoring) View |
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How to Find the Focus and Directrix of a Parabola (searching4math) View |
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Writing the equation of a parabola given focus and directrix (Brian McLogan) View |
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Parabolas: Directrix, Focus, Vertex (MATHguide) View |
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Calculating the distance to the focus of a parabolic satellite dish (Myhre Math MCHS) View |
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Parabola Equation Using Distance Formula (Mario's Math Tutoring) View |
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How to find the directrix, focus and vertex of a parabola (Brian McLogan) View |
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Easiest Way To: Find the Focus, Directrix u0026 Vertex of Any Parabola (AutoCad 101) View |