CLASS-V

MATHS.

MADE BY :- MOHD. RIZWAN

KENDRIYA VIDYALAYA COD.

CHHEOKI (ALLAHABAD)

Area is the amount of surface space that an object has.

Area is reported in the amount of square units.

Perimeter is the distance around the outside edge of an object.

Perimeter is reported as a total number of linear units.

Count the number of green squares to determine the area of this surface. What is the area?

The area is equal to 9 square units.

Try this one!

1

5

2

4

7

3

6

8

9

Area = 15 square CM

Lets find the area of this surface if each square is equal to one CM

Count the number of squares.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Count the number of sides to determine the perimeter of this flat object.

The perimeter is equal to 12units..

Try this one!

Perimeter = 24 CM

Let’s find the perimeter of this surface if each square is equal to one CM

Count the number of sides.

Two neighbours build swimming pools. This is what the pools look like.

Which family has the pool with the bigger swimming area?

Let’s do these problems together.

The area of Family A’s pool is?

8 square units.

7 square units

The area of Family B’s pool is?

Therefore, Family A has the pool with

the bigger swimming area.

The perimeter of Family A’s pool is 12 units long.

The perimeter of Family B’s pool is 14 units long.

Therefore, Family B has more side panels of the pool to clean.

Now look at those same two pools. Which family has more side panels of the pool to clean?

AREA OF SQUARE=

SIDEXSIDE

PERIMETER OF SQUARE=

4XSIDE

AREA OF RECTANGLE=

LENGTHXBREADTH

PERIMETER OF RECTANGLE=

L+B+L+B

=2L+2B

=2x(L+B)

LENGTH(L)

BREADTH (B)

Area of stamp is 4 square cm.Answer the questions:

1Q:-How many stamps will cover the rectangle?

Ans:- 28

2.The rectangle is______cm long and _______cmwide.

3.Area of rectangle is_______ sq.cm.

4.Perimeter of rectangle is______ cm.

5. ___ stamps cover the length and___ stamps cover the width.

14

8

44

112

7

4

When you measure the amount of carpet to cover the floor of a room, you measure it in square units.

Would the area of your bedroom or the area of your house be greater?

You’re right! The area of your house is greater than the area of your bedroom.

When you measure the amount of wallpaper border to go around a room, you measure it in lengths.

Would the perimeter of your bedroom or the perimeter of your house be greater?

You’re right! The perimeter of your house is greater than the perimeter of your bedroom.

Find boundary of figures:

40mx20m

80mx10m

110mx5m

P=2x(110m+5m)

=2x115m

=230m

P=2x(80m+10m)

=2x90m

=180m

P=2x(40m+20m)

=2x60m

=120m

PERIMETER=2X(L+B)

GUESS THE AREA OF SHAPES:

12Sq cm.

9Sq. Cm.

16Sq. cm