1

Cube

Cuboid

Try to count how many cubes that can put into the cuboid ? 12

Example 1

FIND THE VOLUME OF 3D SHAPE BY COUNTING

2

Example 2

How many cubes that can put into the cuboid ? 12

3

Cube

Cuboid

?

Example 1

?

?length

breadth

height

4

1

3

4

Example 2

?

??length

breadth

height

3

2

2

5

Example 1

Example 2

length heightbreadth

length breadth height

12=4 1 3

=223

Total of the cubes

Total of the cubes

12

6

Example 1

length heightbreadth

12=4 1 3

1.) In addition, subtraction, multiplication and division, what is the method that can use to solve the problem?

Multiplication

X X

XX

7

Example 2

length breadth height

=223

Total of the cubes

12X

X

X

X

Conclusion :1.) What is the formula to find the volume of a 3D shape ?

length X breadth X height

8

Find the volume of 3DSo easy so easyTimes length , breadth and the heightThen get answer

REMEMBER THE SONG VOLUME OF 3D SHAPE

London Bridge Falling Down

9

Find the volume of a combination 3D shape.

3 cm

4 cm

2 cm

6 cm

Volume A ( cube )

3 cm X 3 cm X 3 cm

= 27 cm3

Volume B ( cuboid )

6 cm X 4 cm X 2 cm

= 48 cm3

Volume A + Volume B

= 27 cm3 + 48 cm3

= 75 cm3

A

B

answer : 75 cm3

Example

10

1.) Find the volume of a combination 3D shape.

4 cm9 cm

2 cm4 cm

4 cm

Volume A ( cube )

4cm X 4cm X 4cm

= 64 cm3

Volume B ( cuboid )

9cm X 4cm X 2cm

= 72 cm3

Volume A + Volume B

= 64 cm3 + 72 cm3

= 136 cm3

A

B

answer : 136 cm3

11

2.) Find the volume of a combination 3D shape.

2m

3m

2m5m2m

Volume A ( cuboid )

5m X 2m X cm

= 30 m3

Volume B ( cuboid )

2m X 2m X 8m

= 32 m3

Volume A + Volume B

= 30 m3 + 32 m3

= 62 m3

A B

8m

answer : 62 m3

12

3.) Find the volume of a combination 3D shape.

2cm

Volume A ( cuboid )

5cm X 2cm X 2cm

= 20 m3

Volume B ( cuboid )

7cm X 2cm X 2cm

= 28 cm3

Volume C ( cube )

2cm X 2cm X 2cm

= 8 cm3

Volume A + Volume B + Volume C

= 20 cm3 + 28 cm3 + 8 cm3

= 56 m3

answer : 56 cm3

2cm2cm

2cm2cm

5cm 7cm

A BC