1. Revision Formulae: Diameter = 2 x Radius Area of Circle = πr 2 Circumference of circle = 2πr = πd π = 3.14 approximately

2. You are about to see 8 questions You have 30 sec to answer each one Are you Ready? Timed Quiz

3. 1 What is the Circumference? 33 mm

4. 2 What is the Circumference? 4 cm

5. 3 What is the Diameter? What is the Radius? Circumference = 28π cm

6. 4 Which is the odd ones out? a) πD = circumference b) Circumference / π = Radius c) Radius X 2 = Diameter

7. 5 Which has a larger perimeter? 2 cm1 cm a)‏ b)‏

8. 6 What is the Area ? 6 mm

9. 7 Which has a larger Area? 1 cm 2 cm 1 cm a)‏b)‏

10. 8 What is the Circumference? Area = 4π cm 2

11. A How did you do?

12. 1 What is the Circumference? 33 mm C = 2πr C = πd C = 33π mm

13. 2 What is the Circumference? 4 cm C = 8π cm

14. 3 What is the Diameter? What is the Radius? Circumference = 28π cm C = πd, C = 2πr D = 28 cm, R = 14 cm

15. 4 Which is the odd one out? a) πD = circumference b) Circumference / π = Radius c) Radius X 2 = Diameter

16. 5 Which has a larger perimeter? 2 cm1 cm a)‏ b)‏ a) is larger (2π is larger then 4)

17. 6 What is the Area ? 6 mm A = 36π mm 2

18. 7 Which has a larger Area? 1 cm 2 cm 1 cm a)‏b)‏ a) is larger (π cm 2 )‏

19. 8 What is the Circumference? Area = 4π cm 2 C = 4π cm