perimeter and area related various geometrical diagram

5. Perimeter = 24 feet
Let’s find the perimeter of this surface if each square is
equal to one foot.
Count the number of sides.
Perimeter is the distance around the outside
edge of a flat object.

6. PERIMETER OF RECTANGLE
Length=8cm , breadth=4cm
Perimeter= l+b+l+b =2l+2b
=2(l+b) =2(8+4)
= 2(12)cm
=24cm

7. Perimeter of square
Length=breadth=side=10mm
perimeter of square=side+side+side+side
= 4side =4(10)mm
=40mm

9. Area = 15 square
feet
Lets find the area of
this surface if each
square is equal to one
foot.
Count the number of
squares.
1 2
3
4 5 6 7 8
9 10 11 12 13 14
15
Area is the amount of surface space that a
flat object has and Area is reported in the
amount of square units.

10. Area of rectangle
One small square is of 1cm
Length=8cm, breadth=4cm
4 rows and each row has 8squares
Area= 4x8cm
It means lxb= 8x4 =32cm2

11. Area of square
One small square =1mm
So each side= 10mm
There is 10 rows each row has 10 small square
So Area= sidexside
= 10x10= 100mm2
Area of triangle
Length=8cm, breadth=4cm
Area of triangle=
½(area of rectangle)
½(lxb) ,here l = base and b= height
so area of triangle = ½(basexheight)
=1/2(8x4)
=1/2(32) = 16cm2

12. Area of Parallelogram
Area of parallelogram=
area of rectangle
=lxb
But l and b of rectangle area exactly equal
to base and height of parallelogram.
So area of parallelogram = base x height
Here b=12cm and h=25cm
area = 12cmx25cm
= 300cm2

13. Circumference of circle = Ωd =2Ωr
Diameter of circle= 7cm
Radius= 7/2cm
Circumference=Ωd = 2Ωr
= 2x22/7x7/2
=22cm
Area of circle =basexheight
=2Ωr/2 x r
=Ωr2

14. Find area and
perimeter of
given shape
Try this one!