Escitalopram is an oral drug that is used for treating depression and generalized anxiety disorder. Chemically, escitalopram is similar to citalopram . Both are in a class of drugs called selective serotonin reuptake inhibitors (SSRIs), a class that also includes fluoxetine , paroxetine and sertraline .
1 A circle is all of the points that are a fixed distance, known as the radius, from a given point, known as the center of the circle. 2  Explore the standard equation of a circle using the applet below (Go here for a larger version).
For example, to graph the equation. 1  Locate the center of the circle from the equation (h, v). 2  Calculate the radius by solving for r. 3  Plot the radius points on the coordinate plane.  Connect the dots to the graph of the circle with a round, smooth curve.