McGraw Hill Glencoe Geometry, 2012
MH
McGraw Hill Glencoe Geometry, 2012 View details
8. Equations of Circles
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Exercise 1 Page 760

Let's start by recalling the standard form of an equation of a circle.
In this form, is the center of the circle and is its radius. We are told that the center of the circle is and its radius is This information is enough to write the equation.