year 8 maths

3C
Area
133
c i How many m 2 in 1 km 2 ?
ii How many m 2 in 5 km 2 ?
iii How many km 2 in 2 500 000 m 2 ?
1 km = 1000 m
1 km 2
1 km = 1000 m
d i How many m 2 in 1 ha ?
ii How many m 2 in 3 ha ?
iii How many ha in 75 000 m 2 ?
100 m
1 ha
100 m
2 Which length measurements would be used for the base and the
height (in that order) to find the area of these triangles?
a 7 m
b
10 cm
6 cm
3 m
5 m
8 cm
3 How many square metres are in 1 hectare?
c
2.4 mm 2 mm
1.7 mm
Example 6
4 Convert these area measurements to the units shown in the brackets.
a 2 cm 2 (mm 2 ) b 7 m 2 (cm 2 ) c 0.5 km 2 (m 2 )
d 3 ha (m 2 ) e 0.34 cm 2 (mm 2 ) f 700 cm 2 (m 2 )
g 3090 mm 2 (cm 2 ) h 0.004 km 2 (m 2 ) i 2000 cm 2 (m 2 )
j 450000 m 2 (km 2 ) k 4000 m 2 (ha) l 3210 mm 2 (cm 2 )
m 320000 m 2 (ha) n 0.0051 m 2 (cm 2 ) o 0.043 cm 2 (mm 2 )
p 4802 cm 2 (m 2 ) q 19040 m 2 (ha) r 2933 m 2 (ha)
s 0.0049 ha (m 2 ) t 0.77 ha (m 2 ) u 2.4 ha (m 2 )
Example 7
5 Find the areas of these squares, rectangles and triangles.
a
b
7 m 3 m c
3 cm
13 cm
6 cm
d
e
f
12 mm
4 cm
9 cm
3 m
11 m
g
h
3 m i 3 km
7 m
18 m
2 m
4 km
10 km
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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