Conic sections
7 videos
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4
Geometry - What Are Conic Sections?
This video explains conic sections by showing how slicing a cone at different angles creates four curves: circle, ellipse, parabola, and hyperbola.
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2
Geometry - The Standard Equation of a Circle
Learn how to derive the standard equation of a circle using the distance formula and identify the center and radius from the equation.
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2
Geometry - Finding Center and Radius from a Circle Equation
Learn to quickly find the center and radius from circle equations in standard form, and write equations from graphs by identifying key values and watching signs carefully.
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4
Geometry - Completing the Square for Circle Equations
Learn how to convert a circle equation from general form to standard form by completing the square to find the center and radius.
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7
Geometry - Circle Equation: Expanded to Standard Form
Learn how to convert a messy circle equation into standard form by completing the square to find the center and radius.
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8
Geometry - Focus and Directrix of a Parabola
Learn how parabolas are defined by a focus point and directrix line, where every point on the curve is equidistant from both. Includes visual examples and vertex explanation.
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Geometry - Writing a Parabola Equation from Focus and Directrix
Learn how to find the equation of a parabola using a focus point and directrix by setting distances equal and simplifying. Includes a satellite dish example.