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You cannot. You must know, or be able to derive, the length.

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12y ago

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How do you find perimeter without knowing the length or the width?

If you do not know the length and width of ALL sides, then as far as I know it isn't possible to find the perimeter unless you measure each side and then find it.


How do you 'find the ratio of its length to its perimeter?

To find the ratio of the length of a shape to its perimeter, you would divide the length by the perimeter. For example, if the length of a rectangle is 4 units and its perimeter is 12 units, the ratio would be 4/12 or 1/3. This ratio represents the proportion of the length to the total distance around the shape.


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


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

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


What is the perimeter of 18 inches of a rectangle?

To find the perimeter of a rectangle, you need both the length and the width. If you only have one dimension, such as 18 inches, you cannot determine the perimeter without knowing the other dimension. The formula for the perimeter (P) is P = 2(length + width). If you provide either the length or width, I can help you calculate the perimeter.

Related Questions

How do you find perimeter without knowing the length or the width?

If you do not know the length and width of ALL sides, then as far as I know it isn't possible to find the perimeter unless you measure each side and then find it.


How do you 'find the ratio of its length to its perimeter?

To find the ratio of the length of a shape to its perimeter, you would divide the length by the perimeter. For example, if the length of a rectangle is 4 units and its perimeter is 12 units, the ratio would be 4/12 or 1/3. This ratio represents the proportion of the length to the total distance around the shape.


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

width = (perimeter-2*length)/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


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

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


What is the perimeter of 18 inches of a rectangle?

To find the perimeter of a rectangle, you need both the length and the width. If you only have one dimension, such as 18 inches, you cannot determine the perimeter without knowing the other dimension. The formula for the perimeter (P) is P = 2(length + width). If you provide either the length or width, I can help you calculate the 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


How do you find breadth using perimeter and length?

If the shape is a rectangle (or square), then Perimeter = 2*(Length + Breadth) So Breadth = Perimeter/2 - Length


How do you find the perimeter of yards?

The perimeter is the total distance around - width + width+ length + length.


What measurements do you need to find the area and perimeter of a rectangle how would you use these measurements to find the area and perimeter of a rectangle?

you need length and width length multiply width = area length + length + width + width = perimeter


How you find the area of a rectangle from the perimeter and base length?

perimeter (P)=2(length+base) find length, area = length * base = (p/2-base)*base


What is the perimeter of 10cm?

10cm is a length. You can only find perimeter (length all the way round) if there is a shape!