 Translation

Lesson

Translations

A translation is what happens to a shape or object, when we slide it from one place to another. It's as if we are pushing, or moving, our shape around. We aren't flipping, rotating, enlarging or reducing our shape at all.

A good way to remember this is to think of each part of our shape moving by the same amount, in the same direction. If you look at the sofa below, it has moved to the right. This is a translation, since each part of the sofa has moved in the same direction, by the same distance.  Let's look at some shapes and see whether or not they are translations. We will also look at how to describe how an object has been moved, or been translated.

Using a grid

A grid can help us describe a translation because we can look at how many units, or spaces an object has moved. We can also look at the direction it has moved. For example, the flower pot below has moved down $2$2 units. Sometimes an object might move more than once. Let's look at this in more detail now. Remember!

A translation means the whole shapes moves by the same amount, in the same direction. The shape can't change size, rotate, or include a reflection at all.

Worked Examples

QUESTION 1

Which picture shows a translation?

1. A B C D A B C D

QUESTION 2

Which of the following represents a translation of the flag 1 unit up and 2 units to the right? 1. A B C A B C

Question 3

What translation is involved in moving the square from: 1. position $A$A to position $B$B?

$1$1 unit to the right

A

$3$3 units up

B

$3$3 units down

C

$2$2 units to the left

D

$1$1 unit to the right

A

$3$3 units up

B

$3$3 units down

C

$2$2 units to the left

D
2. position $A$A to position $C$C?

$2$2 units up

A

$2$2 units to the right

B

$2$2 units to the left

C

$2$2 units down

D

$2$2 units up

A

$2$2 units to the right

B

$2$2 units to the left

C

$2$2 units down

D
3. position $A$A to position $D$D?

$2$2 units up and $1$1 unit to the left

A

$3$3 units up and $3$3 units to the right

B

$2$2 units down and $3$3 units to the right

C

$3$3 units up and $2$2 units to the right

D

$2$2 units up and $1$1 unit to the left

A

$3$3 units up and $3$3 units to the right

B

$2$2 units down and $3$3 units to the right

C

$3$3 units up and $2$2 units to the right

D

Outcomes

GM2-7

Predict and communicate the results of translations, refl ections, and rotations on plane shapes.