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Area

# Area

The amount of surface enclosed by a closed figure is called its area.

Lesson Demo

The amount of surface enclosed by a closed figure is called its area
The following conventions are to be adopted while calculating the area of a closed figure using a squared or graph paper.

1. Count the fully-filled squares covered by the closed figure as one square unit or unit square each.

2. Count the half-filled squares as half a square unit.

3. Count the squares that are more than half-filled as one square unit.

4. Ignore the squares filled less than half.

For example, the area of this shape can be calculated as shown:

 Covered area Number Area estimate (sq. units) Fully filled squares 6 6 Half–filled squares 7 7 x ½ Squares filled more than half 0 0 Squares filled less than half 0 0

Area covered by full squares = 6 x 1 = 6 sq. units
Area covered by half squares = 7 x ½ = 7/2= 3 ½ sq. units
Total area of the given shape = 6 + 3 ½ sq. units
Thus, the total area of the given shape = 9 ½ sq. Units

Area of a rectangle can be obtained by multiplying length by breadth.  Area of the  square can be obtained by multiplying side by side.