Khan Academy on a Stick
Conic sections
Identifying and graphing circles, ellipses, parabolas, and hyperbolas.

Introduction to Conic Sections
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What are conic sections and why are they called "conic sections"?
Conic section basics
What is a conic other than a jazz singer from New Orleans? Well, as you'll see in this tutorial, a conic section is formed when you intersect a plane with cones. You end up with some familiar shapes (like circles and ellipses) and some that are a bit unexpected (like hyperbolas). This tutorial gets you set up with the basics and is a good foundation for going deeper into the world of conic sections.

Conic Sections: Intro to Circles
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Introduction to the Circle
 Completing the square to write equation in standard form of a circle
Circles
You've seen circles your entire life. You've even studied them a bit in math class. Now we go further, taking a deep look at the equations of circles.

Conic Sections: Intro to Ellipses
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Introduction to the ellipse.

Foci of an Ellipse
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Calculating the foci (or focuses) of an Ellipse.
Ellipses
What would you call a circle that isn't a circle? One that is taller or fatter rather than being perfectly round? An ellipse. (All circles are special cases of ellipses.) In this tutorial we go deep into the equations and graphs of ellipses.

Parabola Focus and Directrix 1
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Parabola as the locus of all points equidistant from a point and a line

Focus and Directrix of a Parabola 2
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Finding the focus and directrix of a parabola
Parabolas
You've seen parabolas already when you graphed quadratic functions. Now we will look at them from a conic perspective. In particular we will look at them as the set of all points equidistant from a point (focus) and a line (directrix). Have fun!

Conic Sections: Intro to Hyperbolas
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Introduction to the hyperbola

Conic Sections: Hyperbolas 2
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Continuation of the intro to hyperbolas

Conic Sections: Hyperbolas 3
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Part 3 of the intro to hyperbolas

Foci of a Hyperbola
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Introduction to the foci (focuses) of a hyperbola

Proof: Hyperbola Foci
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Proof of the hyperbola foci formula
Hyperbolas
It is no hyperbole to say that hyperbolas are awesome. In this tutorial, we look closely at this wacky conic section. We pay special attention to its graph and equation.

Identifying an ellipse from equation
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Part 1 of identifying and graphic conic sections

Identifying a hyperbola from an equation
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Part 2 of identifying and graphing conic sections

Identifying circles and parabolas from equations
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Let's identify (and graph) a couple of more conics!

Hyperbola and parabola examples
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Parabola, Hyperbolas, etc.
Identifying conics from equations
You're familiar with the graphs and equations of all of the conic sections. Now you want practice identifying them given only their equations. You, my friend, are about to click on exactly the right tutorial.