Question

The rectangle below is dilated by a scale factor of 2. Find the perimeter and area of the rectangle below, as well as the perimeter and area of the dilated rectangle. Express your answers as whole numbers, decimals, or fractions in simplest terms (no mixed numbers). Figures are not necessarily drawn to scale. The small squares numbers are 15, 20 and 25. Perimeter of given rectangle _ units. Perimeter of dilated rectangle _ units. Area of given rectangle _ units^2. Area of dilated rectangle _
units^2.

Answer 1

Those side lengths are 15 and 20 (with diagonal 25).

Perimeter (original) = 2(15+20) = 70 units.
Perimeter (dilated by 2) = 2(30+40) = 140 units.

Area (original) = 15·20 = 300 units^2.
Area (dilated) = 4·300 = 1200 units^2.