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 a Waste on both "Warts 'n' Audience" and "Straight from the Desk". Dury re-recorded the song with Curve in 1993 for the "Peace Together" album. The recording was also included on Curve's 2004 compilation album "The Way of Curve". Although the original single omits the exclamation mark, "What a Waste" is sometimes written with one, including on "Live! Warts 'n' Audience". Part of the bridge section of "What a Waste" was sampled by A Tribe Called Quest on their 1991 single "Can I Kick It?". What a Waste "What a Waste" is a song and single by Ian Dury and the Blockheads,