how well did you do? did you show calculations ?

Do now: These cuboids are all made from 1 cm cubes.Can you find their volumes and surface areas? State the units in your answers.

1 2 3

4 5 6

How well did you do? Did you show calculations ?

1 2 3

4 5 6

V = 1 x 2 x 4 = 8cm3 V = 2 x 2 x 4 = 16cm3V = 3 x 3 x 3 = 27cm3

V = 3 x 3 x 5 = 45cm3 V = 2 x 4 x 4 = 32cm3V = 4 x 4 x 2 = 32cm3

SA = 2 x 9 + 2 x 15 + 2 x 15= 78cm2

SA = 2 x 16 + 2 x 8 + 2 x 8= 64cm2

SA = 2 x 4 + 2 x 8 + 2 x 8= 40cm2

SA = 2 x 9 + 2 x 9 + 2 x 9= 54cm2

How well did you do? Did you show calculations ?

1 2 3

4 5 6

SA = 2 x 8 + 2 x 4 + 2 x 2= 28cm2

SA = 2 x 8 + 2 x 8 + 2 x 16= 64cm2

Extra challenge: Can you find the length, width and height of another cuboid that has a volume of 60cm3 ?

Challenge question 1:These two shapes each have a volume of 60cm3

Can you find the missing lengths?

1 2

?

6 cm

5 cm

?

3 cm 5 cm

3 x 5 x 4 = 60cm3

How well did you do? Did you solve these problems correctly, showing your calculations?

1 2

?

6 cm

5 cm

?

3 cm 5 cm

6 x 5 x 2 =60cm3

Challenge question 2:These two shapes have the same volume.

Can you find the missing length?

5 cm

4 cm

?

8 cm

4 cm 10 cm

How well did you do? Did you solve the problem correctly, showing your calculations?

5 cm

4 cm

?

8 cm

3 cm 10 cm

8 x 3 x 10 = 240cm3 4 x 5 x 12 =240cm3

How did you work out the answer?