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Half squares in figure = 21
Area covered by full squares = 32 × 1 sq. unit = 32 sq. unit.
Area covered by half squares = 21 × (1/2) sq. unit. = 10.5 sq. unit.
Total area covered by figure = 32 + 10.5 = 42.5 sq. unit.
 Area of a Rectangle

Area of a rectangle = (length × breadth)

Example:

Find the area of a rectangle whose length and breadth are 20 cm and 12 cm respectively.

Solution:

Length of the rectangle = 20 cm

Breadth of the rectangle = 12 cm

Area of the rectangle = length × breadth

= 20 cm × 12 cm

= 240 sq cm.

 To find the length of a rectangle if breadth and area are given:

 Length =

 To find the breadth of a rectangle if length and area are given:

 breadth =

Example:

What will be the length of the rectangle if its breadth is 6 m and the area is 48sq.m?
Solution:

Length =

= = 8 m

 Area of a Square
Area of a square is the region covered by the boundary of a square.