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Example Questions
Example Question #2 : How To Find The Perimeter Of A Rectangle
Robert is designing a rectangular garden. He wants the area of the garden to be 9 square meters. If the length of the lot is going to be three meters less than twice the width, what will the perimeter of the lot be in meters?
3
12
10
1.5
6
12
Let l be the length of the garden and w be the width.
By the specifications of the problem, l = 2w-3.
Plug this in for length in the area formula:
A = l x w = (2w - 3) x w = 9
Solve for the width:
2w²- 3w - 9 =0
(2w + 3)(w - 3) = 0
w is either 3 or -3/2, but we can't have a negative width, so w = 3.
If w = 3, then length = 2(3) - 3 = 3.
Now plug the width and length into the formula for perimeter:
P = 2 l + 2w = 2(3) + 2(3) = 12
Example Question #1 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
Recall how to find the perimeter of a rectangle:
For the given rectangle,
Example Question #11 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
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For the given rectangle,
Example Question #12 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
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For the given rectangle,
Example Question #21 : Quadrilaterals
Find the perimeter of a rectangle that has a length of and a width of .
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For the given rectangle,
Example Question #14 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
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For the given rectangle,
Example Question #15 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
Recall how to find the perimeter of a rectangle:
For the given rectangle,
Example Question #16 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
Recall how to find the perimeter of a rectangle:
For the given rectangle,
Example Question #17 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of .
Recall how to find the perimeter of a rectangle:
For the given rectangle,
Example Question #18 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a width of and a length of .
Recall how to find the perimeter of a rectangle:
For the given rectangle,