Algebra II: Graphing the equation of a circle
 This is a free lesson from our course in Algebra II This lesson covers important basics of a circle like radius, center etc. Further you'll learn how to identify the key elements and graph the circles. You will find some examples with solution, and the instructor explains all that with the help of audio, video presentation and in own hand writing. A circle is the set of all points equidistant from a given point and this point is called the center. The distance from the center to a point on the circle is called the radius. When the center of the circle is at origin (0, 0), and the radius is r, its equation is x2 + y2 = r2 and equation of circle with center at point (h , k) is          (x - h)2 + (y - k)2 = r2.  For example, equation of circle with center (3 , 3) and radius 2 is          (x - 3)2 + (y - 3) 2 = 4.
Other useful lessons:
 Completing the square Graphing the equation of a parabola Graphing the equation of a hyperbola Calculating the asymptotes Conic sections and special points
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