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.
Did you know?