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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 V = 1 x 2 x 4 = 8cm3 4 V = 3 x 3 x 5 = 45cm3 2 V = 3 x 3 x 3 = 27cm3 5 V = 4 x 4 x 2 = 32cm3 3 V = 2 x 2 x 4 = 16cm3 6 V = 2 x 4 x 4 = 32cm3 How well did you do? Did you show calculations ? 1 SA = 2 x 8 + 2 x 4 + 2 x 2 = 28cm2 4 SA = 2 x 9 + 2 x 15 + 2 x 15 = 78cm2 2 SA = 2 x 9 + 2 x 9 + 2 x 9 = 54cm2 5 SA = 2 x 16 + 2 x 8 + 2 x 8 = 64cm2 3 SA = 2 x 4 + 2 x 8 + 2 x 8 = 40cm2 6 SA = 2 x 8 + 2 x 8 + 2 x 16 = 64cm2 Challenge question 1: These two shapes each have a volume of 60cm3 Can you find the missing lengths? 1 2 ? 6 cm 3 cm 5 cm ? 5 cm Extra challenge: Can you find the length, width and height of another cuboid that has a volume of 60cm3 ? How well did you do? Did you solve these problems correctly, showing your calculations? 1 2 ? 6 cm 3 cm 5 cm ? 3 x 5 x 4 = 60cm3 5 cm 6 x 5 x 2 =60cm3 Challenge question 2: These two shapes have the same volume. Can you find the missing length? 4 cm 8 cm 4 cm 10 cm 5 cm ? How well did you do? Did you solve the problem correctly, showing your calculations? 4 cm 8 cm 3 cm 10 cm 8 x 3 x 10 = 240cm3 5 cm ? 4 x 5 x 12 =240cm3 How did you work out the answer?