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Q: How do you find the perimeter of a 3d rectangle?

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There is no reason for the perimeter of a triangle to have any relation to the perimeter of an unrelated 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 , find its area.

find the perimeter and area of a rectangle that is 15cm long and 5cm wide

the length of a rectangle is 5 more then the width. Find the perimeter and the area of the rectangle

To find the perimeter you add and to find the area we multiply.

Square is a special case of a rectangle and the same formula may be used to find the perimeter

To find the perimeter of a rectangle you must calculate the lengths of each of the sides and add them all together.

no

what is the perimeter of the rectangle

how can you find the perimeter of a cone i.e. a 3d shape!

The perimeter of any 2D shape is the sum of all of the individual sides. For example: the perimeter of a rectangle is = length of rectangle (top) + length of rectangle (bottom) + height of rectangle (Left) + height of rectangle (Right)

The perimeter of a rectangle is the sum of its 4 sides added together.

yes

2*(base) + 2*(height) = perimeter

I believe you've already found it.

how do you find the area of a rectangle witha perimeter of 36 in You don't. You need more information For example a 1 x 17 rectangle has a perimeter of 36 and its area is 17. But a 2 x 16 rectangle also has a perimeter of 36 and its area is 32.

You cannot.

Height = (Perimeter/2) - Base

I think so

Perimeter = 12 + 12 + 8 + 8 = 40.

You divide the perimeter by the width and you get the lenght

Perimeter = 2*(L + W).

Rem to Find area and rectangle of a rectangle Input "Length?",l Input"Breadth?",b let area=l*b let perimeter=2*l+b ?area ?perimeter

If the length of a rectangle is twice its width and it has a perimeter of 48, then the rectangle is 16 in length and 8 in width.