Circle a triangle whose base has the length of the circle's circumference and whose height equals the circle's radius, which comes to multiplied by the radius squared: Equivalently, denoting diameter by "d", that is, approximately 79% of the circumscribing square (whose side is of length "d"). The circle is the plane curve enclosing the maximum area for a given arc length. This relates the circle to a problem in the calculus of variations, namely the isoperimetric inequality. Equation of a circle<br> In an "x"–"y" Cartesian coordinate system, the circle with centre coordinates ("a", "b") and radius "r" is the set of
There Is a Light That Never Goes Out than that. I was listening to what the Velvet Underground were listening to". AllMusic's Tim DiGravina argues that while depressed characters were a regular feature in Morrissey's work, his lyrics on "There Is a Light" "ups the sad-and-doomed quotient by leaps and bounds." Goddard argues in his book "Songs That Saved Your Life" that the basic narrative story is similar to that of the James Dean film "Rebel Without a Cause", in which Dean—an idol of Morrissey's—leaves his tortuous home life, being the passenger to a potential romantic partner. In fact, a line from that movie ("It is not my