PERIMETER AND AREA OF SIMPLE GEOMETRICAL FIGURE
Summary of perimeter and area of simple geometrical figure
Solved exercise of perimeter and area of simple geometrical figure
The sum of length of all the sides of a geometrical figure is called its perimeter.
Example: Planning the construction of a house. Since you have to pour a concrete foundation, within the housing constraints you want to maximize the area within the constraints which are related to the perimeter (like you can only get so close to a neighbor’s house, etc.)
Perimeter of simple geometrical figures
Some simple geometrical figures are
Find the perimeter of the Geometrical figures.
|GIVEN EF=3CM, FG=5CM ,GH=7CM ,HI=5CM ,IE=4CM |
Perimeter = EF+ FG+ GH+ HI+ IE
|GIVEN JK8C, JN=2CM,KL=6CM, MN-5CM ML 6CM |
Perimeter= JK+ JN +KL+MN +ML
8CM + 2CM+ 6CM+ 5CM+ 6CM
|Given PQ=4CM,QR=2CM,RS=2CM,ST=4CM,TU=3CM,PU=3CM |
Perimeter = 18CM
|GIVEN= 7CM, XC=8CM, NC=4CM, RN=6CM, MR=3C MW=2CM |
II. In list ‘A’ plane figures and in list ‘B’ their perimeters are given. Match list ‘A’ with list ‘B’
Perimeter( sum of 4 sides) = 24cm
Sum of 3 sides =22cm
Length of the 4th side =2cm
Sum of given 3 sides = 2cm+ 10cm+ 10cm
Length and four side = perimeter – sum of 3 sides
Length of 4th side =24cm -22cm = 22cm.
Perimeter (sum of 5 sides)=24cm
=sum of 4 sides =19cm
Length of the 5 sides =5cm
Sum of given 4 sides=3cm+ 4cm+ 4cm+ 8cm
Length and fifth side = perimeter-sum of 3 sides
Length of 5 sides =24cm -19cm =5cm.
In general area is expressed in square unit. ∴Units of Area : Sq cms, Sq mtrs, Sq kms… etc.
Count the number of squares inside the shape. Totally there are 7 squares. Area of given shape = 7 sq cm.
On the graph sheet given, the area of each square is 1 sq cm. Find the area of the given shapes.
There are totally 5 square.
Area of given shape =5 sq cm
There are totally 21 square
Area of given shape=21 sq cm.
There are totally 16 Square
Area of given shape=16 sq cm.
There are totally 20 Square
Area of given shape=20 sq cm.
There are totally 12 Square
Area of given shape=12 sq cm.