Answer to Question #26644 in Geometry for enrique
W = A/L = 630[cm²]/30[cm] = 21[cm]
long. According to the Pythagoras' theorem, the diagonal of a sheet of paper is
D = √(W² + L²) = √((30[cm])² + (21[cm])²) = √1341[cm] ≈ 36.62[cm]
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