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If you are given the area you will have to think what do you times with the number you have to get it.

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Q: How do you find a perimeter of a rectangle with one number given?
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How do you find the width of a rectangle when the length and perimeter is given?

You multiply the length by 2 (because there are two sides of the rectangle that have that measure). You then subtract that number from the perimeter. The number you will be left with is twice the width, so you divide that by two and you get the width of the rectangle.


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

Multiply length by width


How do you find the perimeter of a rectangle when only the area is given?

You cannot find the perimeter unless the rectangle is a regular rectangle (a square) in which case the perimeter is 4 times the square root of the area. With just the area the shape of the rectangle could be any number of shapes with different perimeter, for example, imagine 6 square units 1cm by 1cm arranged in a 1*6 configuration to give a long thin rectangle, the perimeter would be 6+6+1+1=14cm, the same 6 arranged in a 3*2 rectangle would have the same area, but a perimeter of 3+3+2+2=10cm, for this reason a rectangle's perimeter cannot be determined from the area alone.


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 can you find the area of a rectangle if the given is the perimeter and the diagonal?

First divide the perimeter by 2 then subtract the diagonal from this. The number left with must equal two numbers that when squared and added together equals the diagonal when squared (Pythagoras' theorem) These numbers will then be the length and height of the rectangle.

Related questions

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

You cannot.


How do you find the height of a rectangle with the base and perimeter given?

Height = (Perimeter/2) - Base


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

Perimeter = 2*(L + W).


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

You multiply the length by 2 (because there are two sides of the rectangle that have that measure). You then subtract that number from the perimeter. The number you will be left with is twice the width, so you divide that by two and you get the width of the rectangle.


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

Multiply length by width


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

Length = (Perimeter - twice width) / 2


What is the relationship for perimeter and area for rectangle?

There is no relationship between the perimeter and area of a rectangle. Knowing the perimeter, it's not possible to find the area. If you pick a number for the perimeter, there are an infinite number of rectangles with different areas that all have that perimeter. Knowing the area, it's not possible to find the perimeter. If you pick a number for the area, there are an infinite number of rectangles with different perimeters that all have that area.


How do you find the perimeter of a triangle with the perimeter of a rectangle?

There is no reason for the perimeter of a triangle to have any relation to the perimeter of an unrelated rectangle!


How to find a perimeter of the rectangle?

the perimeter of a rectangle is calculated by : 2*(l+b)


The length of a rectangle is twice its width If the perimeter of the rectangle is 54y find its area?

The length of a rectangle is twice its width. If the perimeter of the rectangle is , find its area.


How do you find the perimeter of a rectangle when only the area is given?

You cannot find the perimeter unless the rectangle is a regular rectangle (a square) in which case the perimeter is 4 times the square root of the area. With just the area the shape of the rectangle could be any number of shapes with different perimeter, for example, imagine 6 square units 1cm by 1cm arranged in a 1*6 configuration to give a long thin rectangle, the perimeter would be 6+6+1+1=14cm, the same 6 arranged in a 3*2 rectangle would have the same area, but a perimeter of 3+3+2+2=10cm, for this reason a rectangle's perimeter cannot be determined from the area alone.


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

by appying 2l+2w