If a rectangle has a length that is twice its width, what is the relationship between its perimeter and area?

Prepare for the Praxis Elementary Education Test Math section. Study with interactive questions and explanations. Prepare confidently for your exam!

To determine the relationship between the perimeter and area of a rectangle in which the length is twice its width, let's define the width as ( w ). Consequently, the length would be ( 2w ).

The perimeter ( P ) of a rectangle is calculated using the formula:

[ P = 2(\text{length} + \text{width}) ]

Substituting in our variables:

[ P = 2(2w + w) = 2(3w) = 6w ]

Next, the area ( A ) of the rectangle is calculated using the formula:

[ A = \text{length} \times \text{width} ]

Substituting again:

[ A = 2w \times w = 2w^2 ]

Now, to compare the perimeter with the area, we need to express both in terms of ( w ).

We see that:

  • The perimeter ( P ) is ( 6w ),

  • The area ( A ) is ( 2w^2 ).

To find the relationship between perimeter and area, we can compare ( P ) and ( A ):

  1. Consider ( 6w ) and
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