Page 374 - Math Smart - 7

Try and Apply!

We have learnt simple tessellation patterns in Stage 5. A tessellation is a repeating pattern of one or
more shapes that has no gaps or overlaps between the unit shapes.

We can obtain a tessellation using translation. Try making a unit shape to tessellate using this method.

Unit shape add cut

Translation tessellation

16.2.2 Reflection
O Spotlight

Reflection Is a another type of transformation that acts like
Watch this video to find a mirror. In a reflection, every part of the object is flipped
out how translation along the mirror line (line of reflection) to form an image.
helps you to form unit The image and the object are congruent.
shapes that are good for
Let us use coordinates to describe reflections of 2D shapes.
tessellation.

HiWH

m
Look at the triangle RST on the right.
Here are some tips on
The coordinates of its vertices are:
how to craft your own
tessellation using square R{-2, 4)S(-2, 1)TM, 3)
sticky notes! Let us reflect triangle RST along
the v-axis. \
mm nirror lin
->-X
_5 _4 _3 _2 -1 U 3 4

Transformation