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Assuming you mean a rectangle: use the formula:p = 2(l+w)

(i.e., perimeter equals twice length plus width). In this formula, replace p with the known perimeter, and l with the given length, then solve for width.

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7y ago
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10y ago

you have to add all of the outside to get the perimeter of the answer.

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7y ago

The perimeter is two times the length plus two times the width. If you have two variables, solve for the third one.

P = 2L + 2 W

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Q: When given the perimeter how do you find the length and width?
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Related questions

What is the formula to find the length of a rectangle when the perimeter and width is already given?

Length = (Perimeter - twice width) / 2


How do you find the length of a rectangle if the perimeter is 40 and the width is 2inches?

perimeter = 2 x (length + width) ⇒ length + width = perimeter ÷ 2 ⇒ length = (perimeter ÷ 2) - width So to find the length of the given rectangle, subtract the width from half the perimeter is how to do it. IF you meant "What is the length..." then: length = perimeter ÷ 2 - width = 40 ÷ 2 - 2 in = 20 - 2 in = 18 in


How do you find area when given perimeter and width?

If you are given the width and the perimeter, then figure out what the length is then calculate the area... hope this helps :)


How do you find the length and width of rectangle when given the perimeter but not the width or length?

by appying 2l+2w


How do you find the perimeter of a rectangle given the length and width?

Perimeter = 2*(L + W).


How do you find width when you have perimeter and length?

width = (perimeter-2*length)/2


How do you find the length and width of a rectangle when given the area and perimeter?

By forming a quadratic equation from the information given and then the length and width can be found by solving the equation.


How do you find Length and width whe area and perimeter are given?

It depends on the shape.


How do you find the optimal area of a rectangle given its perimeter?

Multiply length by width


What is one different way to to find the perimeter of a rectangle?

Length + length + width + width = perimeter. Length + width x 2 = perimeter


How do you find the perimeter of a rectangle with only the width or length and the area given?

It not possible you nit witt that is not true length x width = area If you know length and area, solve width width = area / length then 2 x length + 2 x width = perimeter


How do you find the width of a rectangle if you know the perimeter and the length?

Perimeter = 2 * width + 2 * length, so rearranging --> width = (Perimeter / 2) - length