Theory:

In our day - to - day life under different situations, we deal with shapes, boundaries, and surfaces.
 
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A worker wants to lay tiles on the floor. Before buying the tiles, he needs to know the total number of the tiles required to fill the floor. To calculate the number of tiles, he must know the side length of the floor. This side length of the floor is called as perimeter.
The measure of the sum of the distance around the closed figure is called as a perimeter.
Example:
1. To calculate the distance covered when walking around the park.
 
2. A gardener who built fences around their land.
 
3. To calculate the length of the sides of the photo frame.
All these examples comes under the concept of perimeter.