Page 48 - 01-Yr5_Front cover-ccp.indd

II Garden perim.eters II II II II II

QJ Find the total distance around each of these gardens.
Show your workings-out.

4·8m x 7·3m

,~ - -- - - -----
' ~· 9mx5m
~!
· m
4· m
'-------~,....--..... i~----~----l
6mx7

Perimeter is the total distance around a closed
shape. A rule (or formula) for working out the
perimeter of a rectangle is: P = 2 (I+ b ).

P=2(/+b) Sm
= 2 (7 + 5) m
= 2 (12) m
[3:J Check your answers to QJ = 24m
using this formula. 7m
P represents perimeter.
Does the formula work l represents length.
for every example? b represents breadth.

CHALLENGE
• Using the formula, work out the perimeters of these patios.

6m v: 9·0m ~

3m
45m • ~~ B

• A garden centre stocks edging strips in 60 cm and 90 cm lengths.
• Investigate which length of strips will give the best fit for each patio.
• Draw a plan to show how the lengths of edging fit around each patio.
• Decide what you would order for patio A and for patio B.

I STEPS 5:10 I