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Therefore, in the figure,

Unit squares covered Number Area Estimated (sq units)
Fully filled squares 10 10
Half-filled squares 4 1 ×= 2
4
2
More than half-filled squares 6 6
Less than half-filled squares 4 0
Therefore, the area of the figure = (10 + 2 + 6 + 0) sq. units = 18 sq. units.

Some Standard Units of Area

The area of a square whose side is of length 1 cm is called Remember
a square centimetre and is written as 1 square centimetre, 1 cm Units of area depends
in short, 1 sq. cm. Similarly, the area of a square whose side 1 cm on the unit of the
is of length 1 m is called a square metre and is written as dimensions of the figure.
1 square metre, in short, 1 sq. m and so on.

Practice Time 6B

1. Find the area of the following figures. (Given 1 box = 1 sq cm)
(a) (b) (c) (d)

(e) (f) (g) (h)

2. Find the perimeter and total area covered by the following figures. (Given 1 box = 1 sq cm)

(a) (b)

3. Find the area of the given figure on the square grid. Also draw some irregular
shapes on a square cm grid or a graph paper and find their areas (in sq cm).

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