Page 87 - Mathematics Coursebook

8 Symmetry

!roughout history, symmetry has played a major part in people’s Key words

everyday life. Make sure you learn and
Granada is a city in the south of Spain. It is the capital of the understand these key words:

province of Andalusia. !e Alhambra Palace in Granada is full of 2D shape
symmetrical designs. square
rectangle
parallelogram
rhombus
kite
trapezium
scalene triangle
isosceles triangle
equilateral triangle
right-angled triangle
side
parallel
It was built in the thirteenth century and, although it was equal
originally designed as a military area, it became the residence of angle
royalty and of the court of Granada. solid shape
You can see symmetry everywhere you look, from the design of 3D shape
the gardens and buildings to the tile patterns on the walls. cube
cuboid
square-based pyramid
triangular-based pyramid
triangular prism
cylinder
cone
sphere
face
edge
vertex (vertices)
symmetrical
Look around you at gardens, buildings, windows and tile designs line of symmetry
and see how many symmetrical patterns you can see. !ey are rotational symmetry

everywhere! order
In this unit you will look at the symmetry of shapes and patterns.

86 8 Symmetry