what is perimeter and area
Area:
Area is defined as the indicated number of square unites
needed to fill a region on a flat surface or simple figure. For rectangle, the area is computed by
multiplying its length and width. The rectangle has length of 4 units and width
of 8 units, then the area of this rectangle is equal to 32 square units. It
means that 32 squares are required to fill this region.
Perimeter:
Perimeter is defined as the whole distance around the
exterior on a flat surface. It is the total length of the boundary that
enclosed the interior region.
Let solve different examples which
help to understand area and perimeter.
1 1- A square having 7 m side. Find the area of the square.
We know that the
sides of a square is equal in length that why,
Length of square
= width of square,
So the area of
square = length x length or side x side
Area of square =
7m x 7m = 49 m2
2 2- The length of the side of pentagon is 50 cm find its perimeter in meter.
First of all we
convert cm into meter
We know that 1
meter is equal to 100 cm
So,
50 cm=
50/100m=0.5m
Let’s find the
perimeter of pentagon.
We know that pentagon has 5 sides and all
sides are equal in length.
Suppose the side
of pentagon is x then,
Value of side= x = 0.5 m
Perimeter = x+x+x+x+x
Perimeter=0.5m +
0.5m + 0.5m + 0.5m + 0.5m = 2.5m.
3 3- The area of a square field is 121 m2. Find
the length of a side of a square.
Suppose the side
of square be y
We know that
area of square= side x side=y x y
Area = y2
Put the value
121m2
=y2
√121 = √y2
Now root on both side
11 = y
The length of the
side of square is 11 m
For father details
https://www.khanacademy.org/math/geometry/hs-geo-foundations/hs-geo-area/v/perimeter-and-area-basics
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