PPT: Perimeter and Area | Mathematics (Maths) Class 7 (Old NCERT) PDF Download

 Page 1


Perimeter and
Area
Class 7 
Page 2


Perimeter and
Area
Class 7 
To cover the boundaries
of a garden with flowers,
you need to calculate the
perimeter.
The perimeter is the total
distance around the
garden.
Understanding  &
Calculating  Perimeter
Page 3


Perimeter and
Area
Class 7 
To cover the boundaries
of a garden with flowers,
you need to calculate the
perimeter.
The perimeter is the total
distance around the
garden.
Understanding  &
Calculating  Perimeter
Example: For a rectangular
garden, we can use the
formula  
2*(length + breadth)
Perimeter = 2* (16.3 + 16.7) 
= 66 m
The perimeter of the rectangle
is 66 meters.
Lengths of the sides: 
length = 16.3 m, 
breadth = 16.7 m
Understanding  &
Calculating  Perimeter
Page 4


Perimeter and
Area
Class 7 
To cover the boundaries
of a garden with flowers,
you need to calculate the
perimeter.
The perimeter is the total
distance around the
garden.
Understanding  &
Calculating  Perimeter
Example: For a rectangular
garden, we can use the
formula  
2*(length + breadth)
Perimeter = 2* (16.3 + 16.7) 
= 66 m
The perimeter of the rectangle
is 66 meters.
Lengths of the sides: 
length = 16.3 m, 
breadth = 16.7 m
Understanding  &
Calculating  Perimeter
E x a m p l e : For the same
rectangle:
Length = 16.3 m 
Width = 16.7 m 
Area = Length × Width 
      = 16.3 m × 16.7 m 
      = 272.21 m²
The area is the amount of
space inside a shape. For a
rectangle, it is found by
multiplying the length by the
width.
Understanding  &
Calculating  Area
Page 5


Perimeter and
Area
Class 7 
To cover the boundaries
of a garden with flowers,
you need to calculate the
perimeter.
The perimeter is the total
distance around the
garden.
Understanding  &
Calculating  Perimeter
Example: For a rectangular
garden, we can use the
formula  
2*(length + breadth)
Perimeter = 2* (16.3 + 16.7) 
= 66 m
The perimeter of the rectangle
is 66 meters.
Lengths of the sides: 
length = 16.3 m, 
breadth = 16.7 m
Understanding  &
Calculating  Perimeter
E x a m p l e : For the same
rectangle:
Length = 16.3 m 
Width = 16.7 m 
Area = Length × Width 
      = 16.3 m × 16.7 m 
      = 272.21 m²
The area is the amount of
space inside a shape. For a
rectangle, it is found by
multiplying the length by the
width.
Understanding  &
Calculating  Area A parallelogram is a two-
dimensional geometrical
shape whose sides are
parallel to each other. 
It is a type of polygon
having four sides (also
called quadrilateral),
where the pair of parallel
sides are equal in length. 
Area of Parallelograms