Circles and Conic Sections
A series of free, online video lessons with examples and solutions to help Algebra students learn about circle conic sections.
Related Pages
Conic Sections: Circles
Conic Sections: Ellipses
Conic Sections: Parabolas
Conic Sections: Hyperbolas
What Is The Standard Form Of The Equation Of A Circle?
A circle is a set of points (x, y) which are a fixed distance r, the radius, away from a fixed point (h, k), the center.
The equation of the circle in standard form is
(x - h)2 + (y - k)2 = r2
If a circle is given in general form then we must complete the square on the x and y parts of the equation to rewrite it in standard form.
Conic Sections: The Circle
In this video, you will learn how to identify the equation of a circle, how to write the standard form of a circle from the general form and how to graph a circle.
Conic Sections - Circle Part 1 of 2
Intuitive Math Help - Circles
Conic Sections - Circle Part 2 of 2
Circles (Intuitive Math Help)
Writing Equations Of Circles
This video covers writing equations of circles given information like the radius, center, or a point the circle goes through and the center.
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