Area of a circle trigonometry, uses the coarea formula. Define a function formula_10 by formula_11. Note ρ is a Lipschitz function whose gradient is a unit vector formula_12 (almost everywhere). Let "D" be the disc formula_13 in formula_14. We will show that formula_15, where formula_16 is the two-dimensional Lebesgue measure in formula_14. We shall assume that the one-dimensional Hausdorff measure of the circle formula_18 is formula_19, the circumference of the circle of radius "r". (This can be taken as the definition of circumference.) Then, by the coarea formula, Similar to the onion proof outlined above, we could exploit calculus in a different way in
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,