How to find Perimeter of Rectangle, Square | Class 5 - Orchids

# Area and Perimeter

## The perimeter of Rectangle for Class 5 Math

In mathematics, the perimeter of the rectangle refers to the total length of the rectangleâ€™s edges. Here students will learn about the perimeter of the rectangle formula.

In this learning concept, the students will learn to

• classify the perimeter of a square.
• Identify the perimeter of the rectangle formula and the perimeter of the square formula. Also, the unit of the perimeter.
• Evaluate the perimeter of a polygon.

Each concept is explained to class 5 maths students using illustrations, examples, and mind maps. Students can assess their learning by solving the two printable worksheets given at the pageâ€™s end.

Download the perimeter of the rectangle worksheet for class 5 and check the solutions for the perimeter of the rectangle question provided in PDF format.

## What Is Perimeter?

• The perimeter is defined as the total boundary length of the particular shape.
• Let us learn how to find the perimeter of rectangles and squares.

## Perimeter of Rectangle

• A rectangle has two dimensions namely length and breadth.
• The formula to calculate the perimeter of the rectangle is
Perimeter = 2 Length + 2 Breadth
• The unit of the perimeter is linear.

### Example:

Find the area of the rectangle with a length of 22 cm and a breadth of 13 cm.

Solution:

Length of the rectangle = 22 cm

Breadth of the rectangle = 13 cm

Perimeter of the rectangle = 2 Ã— 22 cm + 2 Ã— 13 cm

= 44 cm + 26 cm

= 70 cm

## Perimeter of Square

• All sides of the square are equal in length.
• The formula to calculate the perimeter of the square is Perimeter = 4 Ã— Side

### Example:

Find the perimeter of a square with a side of 19 cm.

Solution:

Side of the square = 19 cm

The perimeter of the square = 4 Ã— 19 cm

= 76 cm

## Unit of Perimeter

• Perimeter is the sum of the boundary length of the shape.
• When the perimeter of the rectangle is calculated then it has to be made sure that the unit of the length and breadth are the same.
• When we add two same linear units, we get the linear unit.
• Therefore, the perimeter is always measured in the linear unit.
• For example, the perimeter of the rectangle with length and breadth of 15 m and 12 m is 54 m.

## The perimeter of a Polygon:

### Example:

Find the perimeter of the given figure.

Solution:

Perimeter = (5 + 2 + 2 + 2 + 4 + 2 + 6 + 9) cm

= 32 cm

## Missing Length

### Example:

If the perimeter of the given figure is equal to 21 cm, then calculate the missing sides.

Solution:

Step 1:

Sum of the given sides = (4 + 6 + 2) cm

= 12 cm

Step 2:

Perimeter = 21 cm

Missing Length = 21 cm â€“ 12 cm

= 9 cm

New words:

The perimeter of a circle is called the circumference.

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