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SAI International School
Grade -VI

Mathematics

Chapter – 10 – MENSURATION

Lesson Note – 10.2

Subtopics:
 Introduction
 Area
 Area of an irregular closed figure
 Area of a rectangle
 Area of a square

 Area
 Area refers to the surface enclosed by a closed figure.

 To find the area of any irregular closed figure, we can put them on a graph paper with the
square of 1 cm × 1 cm .then estimate the area of that figure by counting the area of the
squares covered by the figure.

 Here one square is taken as 1 sq.unit.
Example:
Find the area of the given figure. (1 square = 1 square m.)

Solution:
The given figure is made up of line segments and is covered with some full squares and
some half squares.

Full squares in figure = 32