Perimeter and Area
Synopsis
Closed Curve:
- A curve which begins and ends at the same point is called a closed curve.
Perimeter:
- The length of the boundary or edge of a figure is called its perimeter.
- Perimeter of a triangle is the sum of the lengths of its three sides.
![](/upload/html_folder/10_Perimeter_Area_M_TO_NZ-4/10_Perimeter_Area_M_TO_NZ-4_files/image001.jpg)
Perimeter of triangle
- The perimeter of a square is four times the length of its side.
![](/upload/html_folder/10_Perimeter_Area_M_TO_NZ-4/10_Perimeter_Area_M_TO_NZ-4_files/image003.png)
Perimeter \[=(\text{4}\times \text{S})\] units
- The perimeter of a rectangle is twice the sum of its length and breadth.
![](/upload/html_folder/10_Perimeter_Area_M_TO_NZ-4/10_Perimeter_Area_M_TO_NZ-4_files/image005.jpg)
Perimeter = 2x (Z + b) units
- Perimeter is expressed in units of length.
Area:
- The amount of surface covered by a plane figure is its area.
- Area of an enclosed plane is the number of square units that fit into it.
- Area is always expressed in square units.