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. Measure the circle's radius with a ruler, or record the figure given to you in the math problem. The radius of a circle measures the distance from the center to any point along the outside of the circle. Step 2. Multiply this measurement by two to calculate the diameter, or distance through the center of the circle.