GEOMETRY • TRANSLATION 265
Using a grid to translate a shape
When we use a grid to translate a shape, we use the word “units” to describe
the number of squares the shape is translated by. Let’s translate a triangle!
Triangle translations
How many different translations of the
triangle are possible on this geoboard?
We’ve shown one to get to you started
- now it’s over to you!
TRY IT OUT
Answer on page 320
Now use a ruler and pencil to join up
the points you made to draw the new
triangle A’B’C’.
To make a diagonal translation, count
six units up, then four units to the
right from each vertex. Plot the three new
points and draw the new triangle A’B’C’.
The new
triangle is
exactly the
same size
and shape
as the
original
Mark a new
point six units
up from each
original vertex
Count six
units up and
Imperial units
along from
each vertex
Let’s move the triangle up by six units.
First, we label the vertices A, B, and C.
Then we count up six units from each vertex
and label the new points A’, B’, and C’.
C ’
A’
B’
C ’
A’
B’
A
C
B
A
C
B
C ’
A’
B’
A
C
B
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