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).
When the equation of a circle appears in general form, it is often beneficial to convert the equation to center-radius form to easily read the center coordinates and the radius for graphing. Examples: 1. Convert into center-radius form.ind the center by using the midpoint formula. Find the radius by using the distance formula. Points (-6,7) and (-1,3) were used here. (d = distance, or radius) Equation: 4. Write the equation for the circle shown below if it is shifted 3 units to the right and 4 units up.