A rectangle, 5cm long and 3cm wide, is enlarged by 3:1 to calculate the area of the figure (135)

No matter what shape (as long as it is planar), when the figure is reduced or enlarged in equal proportion, the area is square: a rectangle is 5cm long and 3cm wide = = > the area of the original rectangle is: 5x3 = 15cm & sup2; the figure enlarged by 3:1 must still be rectangular, and the area is 15x9 = 13

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