Combine Two Formulae To Derive A New One

Interactive macro-enabled MS-Excel spreadsheet. Contents: Combine A = πr² & d = 2r to derive A = ¼πd². Combine y = mx + c & t = ⅕x to derive y = 5mt + c. Combine a = v²/r & ω = v/r to derive a = rω². Combine V = ⅓πr²h & d = 2r to derive V = 1/12πd²h. Combine V = 4/3πr³ & d = 2r to derive V = ⅙πd³. Combine A = lw & P = 2(l + w) to derive A = ½Pw − w². Combine P = 2(l + w) & A = lw to derive P = 2A/w + 2w. Combine P = IV & V = IR to derive P = V²/R. Combine A = 2πr(r + h) & V = πr²h to derive A = 2πr² + 2V/r. Combine A = πr² & C = 2πr to derive A = C²/4π. Combine V = ⅓πr²h & A = πrl to derive V = A²h /3πl². Combine V = 4/3πr³ & S = 4πr² to derive V = S√S/6√π.