In geometry, a translation means moving an object to the left, right, upwards, or downwards without rotating, resizing, or anything else.

Let's take a look at the two triangles \mathcal T and \mathcal T' shown below.

A few things to note:

  • The original shape, \mathcal T, is called the preimage. The shape \mathcal T', the result of the translation, is called the image. In our case, the preimage \mathcal T has been translated 4 units to the right and 2 units upward.

  • It's important to realize that every point on \mathcal T is translated to a point on \mathcal T'. The diagram shows the triangle's vertices being translated, but the same translation applies to every point on each side of the triangle as well.

  • A translation is a type of transformation. There are other types of transformations that we'll learn more about later.

FLAG

The triangle \mathcal{P} (shown below) is shifted 5 units to the right and 4 units downward to give the triangle \mathcal{Q}. Plot the resulting triangle.

EXPLANATION

First, we must translate each point of the triangle 5 units to the right. To accomplish this, we can translate each vertex 5 units to the right and then draw in the line segments between the new vertices.

Next, we must translate each point of the resulting triangle 4 units downward. Again, we translate the vertices and then draw in the line segments between the new vertices. The diagram below shows the resulting triangle.

FLAG

Which of the following statements is true regarding the figures $\mathcal{P}$ and $\mathcal{Q}$ shown above?

a
$\mathcal{Q}$ is the result of the translation of $\mathcal{P}$ by $4$ units to the left and $3$ units downward
b
$\mathcal{Q}$ can't be obtained from $\mathcal{P}$ using only a translation
c
$\mathcal{Q}$ is the result of the translation of $\mathcal{P}$ by $3$ units to the left
d
$\mathcal{Q}$ is the result of the translation of $\mathcal{P}$ by $4$ units downward
e
$\mathcal{Q}$ is the result of the translation of $\mathcal{P}$ by $3$ units to the left and $4$ units downward

The polygon $\mathcal{P}$ (shown above) is shifted $3$ units to the right and $5$ units upward to give the polygon $\mathcal{Q}.$ Which of the following diagrams correctly represents the given situation?

a
b
c
d
e

Consider the transformation that translates the point Q(1,2) by 4 units to the right and 2 units up, as shown below.

We can express this transformation by writing it as a function, as follows:

T(x,y) = (x+4,y+2)

The function above takes a point as its input and gives another point as output. Let's check it with our point Q(1,2){:}

\begin{align*} T(1,2) = (1+4, 2+2) = (5,4)\quad\color{green}{\checkmark} \end{align*}

Any translation of a units to the right and b units up can be written using any of the following notations: \begin{align*} (x,y) \mapsto (x+a,y+b)\\[5pt] T(x,y) = (x+a,y+b) \end{align*}

If a is negative, then the function translates the point (x,y) by |a| units to the left. If b is negative, then the function translates the point (x,y) by |b| units downwards.

FLAG

The triangle shown below is translated using the function f(x,y) = (x+2,y-3). Plot the resulting triangle.

EXPLANATION

The translation f(x,y) = (x+2, y-3) is a shift by 2 units to the right and 3 units downward.

First, we must translate each point 2 unit to the right. To accomplish this, we can translate each vertex 2 units to the right and then draw in the line segments between the new vertices.

Next, we must translate each point of the resulting figure 3 units downward. Again, we translate the vertices and then draw in the line segments between the new vertices. The diagram below shows the resulting triangle.

FLAG

The line segment shown above is translated using the function $T(x,y) = (x+3, y+5).$ What is the resulting segment?

a
b
c
d
e

The triangle shown above is translated using the function $f(x,y) = (x-1,y+5).$ What is the resulting triangle?

a
b
c
d
e

The translation (x,y) \mapsto(x+p, y+q) maps the polygon \mathcal{P} to the polygon \mathcal{Q} as shown above. What are the values of p and q?

EXPLANATION

Every point belonging to \mathcal{P} is translated in the same way. Therefore to determine the values of p and q, we can consider any point of the polygon.

Let's consider the vertex (-2,2). Under the translation, it moves to (8,1). So, we have

(-2, 2) \mapsto (-2+p, 2+q)= (8,1).

We establish the values of p and q by considering the x - and y -coordinates of the above transformation.

  • Looking at the x -coordinates, we must have -2+p = 8, so p=10.

  • Looking at the y -coordinates, we must have 2+q=1, so q=-1.

Therefore, p=10 and q=-1.

FLAG

The translation $T$ given by the function $f(x,y) = (x+p, y+q)$ maps the triangle $\mathcal{P}$ to the triangle $\mathcal{Q},$ as shown above. What are the values of $p$ and $q?$

a
$p=-4$ and $q=4$
b
$p=4$ and $q=6$
c
$p=4$ and $q=-4$
d
$p=-4$ and $q=-4$
e
$p=6$ and $q=4$

The translation $T$ given by the function $(x,y) \mapsto (x+p, y+q)$ maps the point $(-15,5 )$ to the point $(1, 7).$ What are the values of $p$ and $q?$

a
$p=-14$ and $q=2$
b
$p=-8$ and $q=12$
c
$p=16$ and $q=2$
d
$p=-14$ and $q=-2$
e
$p=-16$ and $q=12$

A translation f maps the polygon \mathcal P to the polygon \mathcal Q, as shown above. What is the functional representation of f?

EXPLANATION

Note that if we translate the polygon \mathcal{P} by 5 units to the right and 3 units upward, then we get the polygon \mathcal{Q}.

Therefore, the functional representation of the transformation is

f(x,y)= (x+5,y+3).

FLAG

A translation $T$ maps the polygon $\mathcal P$ to the polygon $\mathcal Q,$ as shown above. What is the functional representation of $T?$

a
$T(x,y) = (x+4,y-6)$
b
$T(x,y) = (x-6,y+4)$
c
$T(x,y) = (x+4,y+6)$
d
$T(x,y) = (x+6,y+4)$
e
$T(x,y) = (x+6,y-4)$

A translation $f$ maps the polygon $\mathcal P$ to the polygon $\mathcal Q,$ as shown above. What is the functional representation of $f?$

a
$f(x,y)= (x-4,y+2)$
b
$f(x,y)= (x+4,y-2)$
c
$f(x,y)= (x-4,y-2)$
d
$f(x,y)= (x+4,y+2)$
e
$f(x,y)= (x-2,y-4)$
Flag Content
Did you notice an error, or do you simply believe that something could be improved? Please explain below.
SUBMIT
CANCEL