Page 170 - Mathematics Coursebook

18 Area, perimeter and volume

!e area of a shape is the amount of space that a shape takes up. Key words
Imagine a square piece of land that is exactly 1 km long and exactly

1 km wide. !e area of this piece of land is 1 square kilometre, Make sure you learn and
understand these key words:
which you can write as 1 km or 1 sq km.
2
1 km area
square kilometre (km )
2
square millimetre (mm )
2
1 km 2 2
or 1 km square centimetre (cm )
2
1 sq km square metre (m )
conversion factor

!e square kilometre is a very large unit of area. You will perimeter
also use much smaller units, when you are measuring smaller compound shape
3

items. !e unit you will use must always be suitable for what cubic centimetre (cm )
3
you are measuring. cubic millimetre (mm )
3
cubic metre (m )
volume
Here are some interesting area facts about places in the world. surface area
net
The smallest ocean in the world is the Arctic.
It has a total area of just over 15 millon sq km.
The largest country in the world is Russia.
It has a total area of just over 17 million sq km.
The largest island in the world is the Greenland.
It has a total area of just over 2 million sq km.
N
AR CTIC OCEAN
GREENLAND
The largest (Denmaark)
freshwater lake in
the world is Lake R U S S I A
Superior in North CAN AD A
America. It has a
total area of KAZAKHSTAN MONGOLIA
82 100 sq km. UNITED STATES
OF
AMERICA CHIN A
NORTH
PACIFIC NORTH INDIA PACIFIC
OCEAN ATLANTIC
OCEAN OCEAN
One of the smallest AFRICA
island in the world is the INDIAN
Grenada. It has a total OCEAN
area of just over 344 sq km.
BRAZIL
The largest saltwater
SOUTH lake in the world is the
ATLANTIC Caspian Sea in Asia. AUSTRALIA
SOUTH OCEAN It has a total area of
PACIFIC ARGENTINA 371 000 sq km.
OCEAN
The smallest country in the world is the Vatican City.
It has a total area of 0.44 sq km.

The largest ocean in the world is the Pacific.
It has a total area of over 155 million sq km.
In this unit you will learn how to work out the area and perimeter of squares and rectangles. You will
also learn how to work out the surface area and volume of cubes and cuboids.
18 Area, perimeter and volume 169