1. Pitch Perimeters
WALT : calculate the perimeter of rectangles

2. What do we mean by the perimeter of a shape?
The total length of all the sides
10cm
5cm
Answer = 30cm

3. What strategies did you use to find your answer?
Add all the sides together
Double the length, double the width and add them together
Add the length and width and double it

4. Now try this one…
25cm
10cm

5. And this one…
50m
25m

6. How do we find the missing lengths?
10cm
5cm
20cm

7. Perimeters worksheet
In your maths book, draw each shape accurately (using a ruler). Then work out the perimeter and record it underneath the shape.

8. Common errors…