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Unformatted text preview: 2.2.9 Write the equation in standard form for a circle with center ______ and tangent to the xaxis. Objective 2 : Sketching the Graph of a Circle Once we know the center and radius of a circle, we can easily graph the circle. For additional points, find any intercepts and plot the points. Note that the ycoordinate of the center of the circle ( 29 ( 29 2 2 1 2 9 x y+ + = ( 2 k = ) is negative because ( 29 ( 29 2 2 2 ( 2) . y y + = Objective 3 : Converting the General Form of a Circle into Standard Form The general form of the equation of a circle is 2 2 Ax By Cx Dy E + + + + = where , , , ,and A B C D E are real numbers and . A B = By completing the square, the equation of a circle can be rewritten from general form to standard form. 2.2.25 Find the center, radius, and intercepts of the circle with the given equation and then sketch the graph....
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 Spring '09
 moshe
 Algebra, Cartesian Coordinate System

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