Q&A for How to Calculate the Perimeter of a Square

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What is the perimeter of a garden that measures 16.3m x 16.7m?

Community Answer

66 m. The formula for perimeter of a rectangle is 2(l + b). Hence the perimeter is = 2 x (16.3+16.7) = 2 x 33 = 66 m.

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If I know two sides of a square, how do I calculate the other sides?

Community Answer

One of the fundamental properties of a square is that all sides are equal. This means that if you know just one of its side's length, you also know all the lengths of the other 3 sides.

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The four sides of the garden, with fence, measure 10m, 8m, 4m, and 12m respectively. How long is the fence?

Donagan

Top Answerer

Add the sides together.

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Question

I know the total square footage of the square, how do I calculate length and width?

Donagan

Top Answerer

The length of a square is equal to its width. Each is equal to the square root of the square's area.

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Question

If the area of a square is 144 sq cm, how do I find out its perimeter?

Donagan

Top Answerer

First find the square root of the area. That gives you the length of a side. Multiply that by four to get the perimeter.

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Question

If the length of each diagonal is 1.5 cm, what's the perimeter of a rhombus?

Donagan

Top Answerer

If the diagonals are equal, the rhombus is a square. By the Pythagorean Theorem, the square of a diagonal is equal to the sum of the squares of two of the sides, which in the case of a square means that the square of a diagonal equals twice the square of a side. Set up an equation to that effect, and solve for a side. Multiply by four to find the perimeter.

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Question

Two side of square are 3x+1 and 4x-2, so what is the perimeter?

Donagan

Top Answerer

All sides of a square are equal in length, so set those two expressions equal to each other. Solve for x, then use the value of x to find the length of a side. Multiply by four.

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Question

If 400 is the area of a square, then what is the perimeter of that square?

Community Answer

If 400 is the area of the square, then the side length of that square must be the square root of 400, or 20. Multiplying 20 by 4 sides gives 80 as the perimeter of the square. Given the area of A, the perimeter is always √A times 4, or 4√A.

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Question

How many significant figures are appropriate to give in the answer when I am calculating the perimeter of a square?

Donagan

Top Answerer

Use the same number of significant digits found in the length and width measurements. If the length and width are given with different numbers of significant digits, use the lower number of significant digits.

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Question

Ho do I find the perimeter if I have the diagonal of a square?

Donagan

Top Answerer

From the Pythagorean theorem, we know that the side of a square is equal to the diagonal divided by the square root of 2. So divide the diagonal by 1.41. Then multiply that number (the side) by four to get the perimeter.

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Question

The perimeter of a square is 20x + 16y. How do I find the lengths of its sides?

Donagan

Top Answerer

You find the length of a side of a square simply by dividing the perimeter by four.

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Question

What is a shape whose area is twice its perimeter?

Donagan

Top Answerer

A square with sides of 8 units each has a perimeter of 32 units and an area of 64 square units.

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Question

How do I find the perimeter of an area of 108 in squared, if one side is 12 inches?

Community Answer

Divide 108 by 12, and that will give you the length of the other side. The length and width are 12 and 8. Then find perimeter = 2*length + 2*width, so the perimeter = 40.

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Question

If the length of the square is 6 cm, and is connected to a rectangle and they ask the perimeter of the square, do I take the side that's connected to the rectangle into account too?

Donagan

Top Answerer

Yes, if they're asking for "the perimeter of the square." If they're asking for the perimeter of the whole figure, you ignore that side of the square and the part of the rectangle's perimeter attached to the square.

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Question

How do I find the perimeter of a square when the dimensions are given as 2x - 1?

Donagan

Top Answerer

If each side of the square is given as (2x - 1), the perimeter would be 4(2x - 1) = 8x - 4.

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Question

How do I find the perimeter of a rectangle if I know the area of it?

Donagan

Top Answerer

You don't have enough information to find the perimeter. You would also have to know the length of at least one of the sides. (You'd then divide the area by the known side to find the other dimension. Then you could add up the four sides to find the perimeter.)

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Question

How do I find the perimeter of a rectangle?

Donagan

Top Answerer

Add twice the length plus twice the width.

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Question

The perimeter of a right angle triangle is 180 cm. If the hypotenuse is 78 cm, how do I find the area of the triangle?

Donagan

Top Answerer

You don't have enough information to find the area. You would need to know the height, another side or some of the angles.

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Question

If the area of a square is 144, does that mean that the perimeter is 48?

Donagan

Top Answerer

Yes.

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Question

How do I find the perimeter of square using mixed numbers?

Donagan

Top Answerer

The inclusion of mixed numbers may complicate the process a bit, but it's still the same process.

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Question

How do I find the area of a square given the perimeter?

Linnie

Top Answerer

You need to first solve for the length of a side. To do so, divide the perimeter by 4. Then, square that number. That is the area of the square.

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