The perimeter of a shape is the sum of its side lengths
The corresponding side length for shape B is 20 feet
How to determine the length
The length-perimeter ratio is given as:
Ratio = Length : Perimeter
For both shapes, we have:
12 : 36 = Length : 60
Express as fraction
[tex]\frac{12}{36} = \frac{Length}{60}[/tex]
Multiply both sides by 60
[tex]Length = \frac{12}{36} * 60[/tex]
[tex]Length =20[/tex]
Hence, the corresponding side length for shape B is 20 feet
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