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).
Consider the formula for the area of a circle: A = Ïr^2. The radius of a circle, the distance from the center to a point on the circumference, is one half of the diameter. Divide the diameter, measured in feet, by two to find the radius of the circle.