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).
The standard form equation of a circle is a way to express the definition of a circle on the coordinate plane. On the coordinate plane, the formula becomes $$(x-h)^2 + (y-k)^2 =r^2 $$.n the coordinate plane, the formula becomes $$(x-h)^2 + (y-k)^2 =r^2 1  $$. h and k are the x and y coordinates of the center of the circle. $$( 2 x-9)^2 + (y-6)^2 =100 $$ is a circle centered at (9,6) with a radius of 10.