1. Measure Units of length, mass and volume Perimeter, area and volume
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2. Measurement Units of length
Measurements are made using the standard metric system.
Units of length
The standard unit of length is the metre (m).
It is often more convenient to measure in decimal multiples of a metre such as: millimetres (mm), centimetres (cm) and kilometres (km).

3. Measurements Converting Units of Length

4. Examples Convert: 2 m to cm. 2 m = 2 x 100 = 200 cm (b) 4 km to m.
4 km = 4 x = 4000 m
(c) 34 cm to mm.
34 cm = 34 x 10 = 340 mm
(d) 50 cm to m.
50 cm = 50 x 100 = 0.5 m

5. Measurement Units of Mass
The standard unit of mass is the kilogram (kg). It is often more convenient to work in milligrams (mg) or grams (g).
1 kg = 1000g Kg g

6. Examples Convert: 2 kg to g. 2 kg = 2 x 1000 = 2000 g (b) 4.6 kg to g.
(c) 300g to kg.
300 g = = 0.3 kg

7. Measurement Units of Volume
Volume is normally measured using m3, millilitres (ml) and litres (l).
1 ml = 1cm3
1 L = 1000ml L ml

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9. Perimeter The perimeter is the distance around a closed shape. Example
Calculate the perimeter of the rectangle
Perimeter =
2 cm
= 16 cm
6 cm

10. Area Area is the amount of space enclosed within a 2D shape.
Area formulae
length
breadth
base
height
A = length x breadth
radius

11. Volume is the amount of space enclosed within a 3D container.
height
breadth
length
Volume =
Length x breadth x height

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