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
What Goes Around Comes Around would dismiss it out of hand, because there's a lot of good music here - more than enough to justify his continued hot streak." What Goes Around Comes Around What Goes Around Comes Around is an album by Waylon Jennings, released on RCA Victor in 1979. By 1979, Jennings was on the tail end a hot streak that had made him one of the biggest superstars in country music. He had scored twelve Top 10 country hits since 1973 (including six chart toppers) and had recorded 4 straight #1 country albums, with 1977's "Ol' Waylon" also hitting #15 on the