1. Perimeter Basics Solving Hard Perimeters Perimeter Perimeter St. Andrew’s Secondary

2. Starter Questions St. Andrew’s Secondary

3. Learning Intention Success Criteria 1.To know the term perimeter of a shape. 1. To understand the term perimeter of a shape. 2. Calculate the perimeter of a shape. Perimeter

4. Perimeter St. Andrew’s Secondary What is perimeter ? Hint answer is on the screen !

5. Perimeter Perimeter St. Andrew’s Secondary

6. Perimeter Perimeter St. Andrew’s Secondary

7. Circumference Perimeter Perimeter St. Andrew’s Secondary

8. Perimeter is the distance round the outside of a 2D shape Perimeter St. Andrew’s Secondary

9. 6cm Calculate the perimeter of the rectangle below. 3cm Perimeter = 6 +3 +6 +3 = 18cm Perimeter St. Andrew’s Secondary

10. 4cm 3cm 5cm Perimeter = 3 + 5 +4 =12cm Perimeter St. Andrew’s Secondary

11. Calculate the perimeter of the rectangle. 10cm 4cm Perimeter =28cm Perimeter St. Andrew’s Secondary

12. Calculate the perimeter of the triangle below. 13cm 5cm 12cm Perimeter = 30cm Perimeter St. Andrew’s Secondary

13. Now try Exercise 3 MIA Ch12 (page 130) St. Andrew’s Secondary Perimeter

14. Starter Questions St. Andrew’s Secondary

15. Learning Intention Success Criteria 1.Work out missing lengths. 1. To work out the perimeter of a shape by first working out missing lengths. 2. Calculate the perimeter of a shape. Perimeter

16. Below is a draw of the school building. Calculate the perimeter. Perimeter St. Andrew’s Secondary Problem 4 m 9 m 8 m x m 12 m 4 m x = 12 – 9 =3 m Perimeter = 12 + 8 + 3 + 4 + 9 + 4 = 40 m

17. Below is a drawing of a kitchen plan. Calculate the perimeter. Perimeter St. Andrew’s Secondary Problem 4 cm 2 m 6 m y cm 2 m 4 m y = 6 – 4 = 2 m Perimeter = 6 + 4 + 2 + 2 + 4 + 2 = 20 m

18. Now try Exercise 4 MIA Ch12 (page 132) St. Andrew’s Secondary Perimeter