Introduction to surface area of rectangle

Introduction to surface area of rectangle

DEFINITION:

• The rectangle is a 4 sided polygon
• Opposite sides of the rectangle will be equal
• Diagonals of the rectangle will also be equal
• Length and width are the four sides of the rectangle
• All the angles of the rectangle will be equal to 90 degree.

Surface area of rectangle:

Surface Area of the rectangle can be found by using the area formula
Surface Area of rectangle is equal to length * width
Here by knowing the length and width of the rectangle, we can calculate the area.
Similarly if we know the area and any one side whether length or width we can find the other side.
The unit of measuring the area is square units.

Problems on Surface Area of Rectangle:

Surface area of rectangle:

 Surface Area of rectangle is equal to length * width

                                          

• Example 1:

Find the surface area of a rectangular field 15 m length and 8 m width.

Solution:

The surface area of a rectangle is equal to its length multiplied by its width. 

Surface area = Length * width

                        = 15 * 8

Surface area = 90 m²  

• Example 2:

Find the surface area of a rectangular field 8 m length and 12 m width.

Solution:

The surface area of a rectangle is equal to its length multiplied by its width. 

Surface area = Length * width

                        = 8 * 12

Surface area = 96 m²

• Example 3:

Find the surface area of a rectangular field 5.2 cm length and 3.7 cm width.

Solution:

The surface area of a rectangle is equal to its length multiplied by its width. 

Surface area = Length * width

                        = 5.2 * 3.7

Surface area = 19.24 cm²

Examples on Surface Area of Rectangle:

• Example 4:

Find the surface area of a rectangular field 7.3 cm length and 4.6 cm width.

Solution:

The surface area of a rectangle is equal to its length multiplied by its width. 

Surface area = Length * width

                        = 7.3 * 4.6

Surface area = 33.58 cm²

• Example 5:

Find the surface area of a rectangular field 3/2 in length and 8/3 in width.

Solution:

The surface area of a rectangle is equal to its length multiplied by its width. 

Surface area = Length * width

                        = (3/2) * (8/3)

Surface area = 4 in²