Translations

Look at the grid, in which each side of a small square measures one unit, and determine the components of the translation vector $\vec{u}$ that moves point $P$ to the position of point $P'$.

Identify which of the following options correctly describes a translation:

1. a) Turning a key in a lock.
2. b) The movement of a drawer when opening it.
3. c) The reflection of a mountain in a lake.
4. d) The movement of the hands of a clock.

In a graphic design application, a teenager is creating a logo. They have drawn a triangle with vertices at $P(2, -1)$, $Q(5, 0)$ and $R(3, 4)$. To complete the design, they need to translate the triangle so that vertex $P$ is situated at the origin $O(0, 0)$.

1. a) State the components of the translation vector $\vec{v}$ that must be applied.
2. b) Calculate the new coordinates of vertices $Q'$ and $R'$ after applying this translation.

Given the line segment with endpoints $A(-3, 1)$ and $B(1, 2)$, calculate the coordinates of the transformed segment $A'B'$ after applying a translation with vector $\vec{v} = (4, 3)$. Plot both line segments on a set of coordinate axes.

Apply a translation with vector $\vec{v} = (6, 2)$ to the triangle with vertices $V_1(0, 0)$, $V_2(2, 0)$ and $V_3(1, 3)$.

1. Write the coordinates of the new vertices.

2. How does the area of the new triangle compare to the original one? Give reasons for your answer.

If we translate point $Q$ by vector $\vec{v} = (-4, 7)$ we obtain point $Q'(0, 2)$. What were the coordinates of the original point $Q$ before the translation?

In a video game, a character is at point $C(5, -2)$. The player presses a key combination equivalent to a translation. If the character suddenly appears at point $C'(1, 3)$, what is the translation vector $\vec{w}$ that acted on it?

Consider the quadrilateral $ABCD$ whose vertices are $A(1, 1)$, $B(4, 1)$, $C(5, 3)$ and $D(2, 3)$, shown in the figure.

1. a) Apply to the quadrilateral a translation by the vector $\vec{t} = (3, -4)$ and write the coordinates of the vertices of the image figure $A'B'C'D'$.
2. b) Calculate the area of the original quadrilateral and check whether the translation has changed its value. Justify your answer based on the properties of isometries.

Given the circle with centre $C(3, -2)$ and radius $r = 4$ units:

1. a) Find the equation or the coordinates of centre $C'$ of the circle translated by vector $\vec{u} = (-5, 6)$.
2. b) What is the radius of the new circle?
3. c) If point $P(7, -2)$ lies on the original circle, calculate the coordinates of its corresponding point $P'$ after the translation.

In the Cartesian plane, we have a line $s$ passing through points $A(0, 2)$ and $B(2, 6)$. We apply a translation by vector $\vec{v} = (1, 3)$ to this line.

1. a) Calculate the coordinates of the transformed points $A'$ and $B'$.
2. b) Find the gradient of the original line $s$ and of the translated line $s'$. What relationship do you notice between them?
3. c) Are there translation vectors that leave line $s$ invariant (that is, such that the transformed line coincides with the original)? Give an example of one such vector.

An object undergoes two consecutive translations. The first is defined by the vector $\vec{u} = (2, 5)$ and the second by the vector $\vec{v} = (3, -1)$. What is the vector of the single translation equivalent to carrying out the previous two one after the other?

Two translations are said to be inverse if, when applied one after the other, the final point coincides with the initial point (yielding the identity).

1. a) If an object has been translated by vector $\vec{v} = (-7, 4)$, what is the vector of the inverse translation?
2. b) If we apply translation $\vec{u} = (3, -2)$ to point $M(x, y)$ and then its inverse, what are the coordinates of the resulting point?
3. c) A boat travels from port $A(10, 20)$ to a buoy $B$ via vector $\vec{v} = (50, -30)$. Due to a storm, it must return immediately to port. What translation vector must it follow to return exactly to point $A$?

A warehouse robot moves along the floor of the building following a straight path. The technician has defined its movement using the composition of three consecutive translations:

1. $\vec{v_1} = (5, -2)$

2. $\vec{v_2} = (-3, 7)$

3. $\vec{v_3} = (a, b)$

If the robot starts at point $(0, 0)$ and after the three movements ends up at point $(4, 4)$, what must the components of the third vector $\vec{v_3}$ be?

A surveillance drone departs from a base located at point $B(12, 15)$, which you can see marked on the grid in the figure. It makes a first displacement following the vector $\vec{u} = (-8, 4)$ to position itself over a target. After completing the mission, it receives an emergency displacement order given by the vector $\vec{v} = (5, -10)$.

1. a) Calculate the final coordinates of the drone after both movements.

1. b) Determine the single translation vector $\vec{w}$ that would allow the drone to return directly from its final position to the base $B$ in a single movement.

1. c) If each grid unit represents $10$ meters, calculate the total distance (magnitude) it would travel on that return trip.