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Finding Area using Geo Dotted Paper

We can also find the area of a figure using geo dotted paper. Each unit on the geo
dotted paper measures 1 cm. So, each square on it has a side of 1 cm and has an

area of 1 sq. cm.

example 3. Find the area of these shapes. Note that each square has a side equal to
1 cm.

a. b. c.

Solution. We can count the number of squares covered by each shape and find the

area as shown below.

a. b. c.

Area = 9 sq. cm Area = 7 sq. cm Area = 11 sq. cm

21 st
Activity Century #Creativity
Skills

Using a ruler, copy this shape, so it reflects on the
right of the mirror line. Then, find the total area of 1 cm
this shape. Also, find the perimeter of the complete
shape.

The total area of this shape = ______ sq. cm.
The perimeter of the complete shape = ______ cm.

175
Perimeter and Area