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).
Step 1: Write the equation of the circle in standard form (). If your equation is in standard form it will make it easier for you to identify the center and radius. If your equation is in the general form you will need to complete the square to both the x terms and the y terms as if they were two separate problems.