Upcoming SlideShare
×

# Perimeter 1

415 views

Published on

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total views
415
On SlideShare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
0
0
Likes
0
Embeds 0
No embeds

No notes for slide

### Perimeter 1

1. 1. Perimeter Adult Numeracy Level 2
2. 2. Perimeter At level 2 you need to understand and use given formulae for finding perimeters of regular shapes. (e.g. rectangular and circular surfaces)
3. 3. Skills required <ul><li>Before completing this module you need to be confident in the following topics </li></ul><ul><ul><ul><li>Addition </li></ul></ul></ul><ul><ul><ul><li>Multiplication </li></ul></ul></ul>
4. 4. All the way round the edge . All the way round the edge . All the way round the edge. All the way round the edge. perimeter
5. 5. Perimeter To find the perimeter of an object or shape add the lengths of all the sides.
6. 6. Perimeter 3m 3m L W 2m 3m P = L + W + L + W = 2L + 2W Perimeter = Length + Width + Length + Width
7. 7. Calculate the distance round a playground of length 85m and breadth 68m. A 5786m B 306m ² C 0.306km D 300m Example question P = 2L + 2W = (2 x 85) + (2 x 68)m = 170 + 136m = 306m = 0. 306km
8. 8. <ul><li>How much edging would you need to go round a lawn of length 6.25m and breadth 4.5m? Give your answer to the nearest metre. </li></ul><ul><li>A 22m </li></ul><ul><li>B 21m </li></ul><ul><li>C 21.50m </li></ul><ul><li>D 20m </li></ul>Example question P = 2L + 2W = (2 x 6.25) + (2 x 4.5)m = 12.5 + 9m = 21.5m = 22m to the nearest metre
9. 9. Example question How many 2-metre-long fence panels are needed to go round the site? A 7 B 13 C 18 D 26 4m 2m 6m Length of fence = 2( 6 + 4 + 2) + 2 = 26m Number of panels = 26 ÷ 2 = 13
10. 10. circumference = 2 x pi x radius radius (r) diameter (d) c = 2 π r = π d circumference π = 3.14
11. 11. Circumference 2.5m 3m How much edging is needed to go round the shrub and paving sections of the garden? shrubs lawn paving c = π d = 3 x 2.5 = 7.5m c = π d = 3 x 3 = 9m Total length = 7.5 + 9 = 16.5m
12. 12. Formulae W L P = 2L + 2W diameter (d) c = π d π = 3.14 often rounded to 3