The perimeter of any closed shape is the total length of all its sides added together. Here's how to find the perimeter of a rectangle:

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The perimeter of any closed shape is the total length of all its sides added together. Here's how to find the perimeter of a rectangle:

Method 1: Adding all side lengths

Since a rectangle has four sides, you can simply find the perimeter by adding the lengths of all four sides.

Formula: Perimeter = Length (long side) + Width (short side) + Length + Width

Here's why it works:

- Rectangles have two long sides with the same length (often called length) and two shorter sides with the same length (often called width).
- By adding the length once, width once, another length, and another width, you essentially add up the lengths of all four sides.

**Method 2: Using a simpler formula (**more efficient for rectangles specifically)

Knowing that rectangles have two equal lengths and two equal widths, we can express the perimeter in a shorter formula:

Formula: Perimeter = 2 (Length + Width)

Here's why it works:

- The number 2 represents that you're adding the length and width twice since there are two sides of each length in a rectangle.

Example:

Imagine a rectangle with a length of 5 meters (long side) and a width of 3 meters (short side).

Method 1:

- Perimeter = 5 meters + 3 meters + 5 meters + 3 meters
- Perimeter = 16 meters

Method 2:

- Perimeter = 2 (5 meters + 3 meters)
- Perimeter = 2 x 8 meters
- Perimeter = 16 meters

Both methods give you the same answer: the perimeter of the rectangle is 16 meters.

Using the formula is generally more efficient for rectangles specifically as it avoids repetitive addition.