Perimeter: 

Perimeter is the distance around the figure. 

Commonly, Perimeter is the sum of all sides. 

Example 1: If we have a square of side 5 cm. What will be the perimeter of a square? 

Solution: As we know that a square has 4 equal sides and if one side is of 5 cm then all the 4 sides will be of 5 cm. 

Note: For square, Perimeter = 4 x length 

 

Perimeter = sum of all sides      

                 = 5 cm + 5 cm + 5 cm + 5 cm 

                 = 20 cm 

Example 2: If we have a rectangle of length 6 cm and breadth 4 cm. What will be the perimeter of a rectangle? 

Solution: As we know that a rectangle has 4 sides. Two opposite equal and parallel sides. 

Note: For rectangle, Perimeter = 2 (length + breadth) = 2 L + 2 B

                                             

Perimeter = sum of all sides      

                 = 6 cm + 6 cm + 4 cm +  4 cm 

                 = 20 cm 

For those who prefer a visual explanation, this video provides a step-by-step guide to calculating the perimeter and area of common shapes like square, rectangle and triangle. Watch it to see how each formula is applied in real-world example, making the concept easier to grasp and apply on your own.  

• Worksheet 1
  
• Worksheet 2
  
• Worksheet 3
  
• Worksheet 4