Perimeter and Area

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Perimeter and Area

• A.K. Gupta
• CNI Boys Inter College, Dehradun

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Perimeter
A perimeter is a path that surrounds an area.
The word comes from the Greek peri (around) and
meter (measure). The term may be used either for
the path or its length - it can be thought of as
the length of the outline of a shape. The
perimeter of a circular area is called its
circumference.
Perimeter 6464 20 units
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Perimeter of the house is equal to the length of
the fence.
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Can you tell the Perimeter of these figures (Let
each side be equal to 2 units)
12 units
12 Units
24 Units
28 Units
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Perimeter is used in many things such as- To
calculate the amount of wood required for a
fence. To calculate the amount of paint
required to paint that fence.

To
calculate the length of cloth required to make a
dress.
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(No Transcript)
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AREA
Area is a quantity that expresses the extent of a
two-dimensional surface or shape, or planar
lamina, in the plane. Area can be understood as
the amount of material with a given thickness
that would be necessary to fashion a model of
the shape, or the amount of paint necessary to
cover the surface with a single coat.
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Area 74 28 Units
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Area of India is 3,287,263 km2
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Area of regular shapes can be calculated by
using Formulae Area of a square of side a
Area of rectangle Area of a circle Area
of a triangle
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Calculate the area of these figures
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Complicated shapes may be converted to simple
Shapes, and then the area of all such shapes may
be added to get the area of the whole shape.

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On the lighter side . . .