Centimeters are commonly used in this case.
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length = 2 x width Perimeter = 2 x (length x width) =2 x (2 x width + width) = 2 x (3 x width) = 6 x width → 6 x width = 48 units → width = 48 units ÷ 6 = 8 units → length = 2 x width = 2 x 8 units = 16 units Ares = length x width = 16 units x 8 units = 128 square units
This is a rectangle with length 5 units and width 3 units. The area = length x width = 5 x 3 = 15 sq units. The perimeter = 2 x (length + width) = 2 x 8 = 16 units.
The length is 20 units and the width is 10 units
10 units and 8 units respectively
length = 7.2 units and width = 5.4 units Solved by means of Pythagoras' theorem.