Math Problem Statement

The figure below is rotated 180° counterclockwise and then translated left 3 units. What are the coordinates of the image of point R after these transformations?

Solution

To find the coordinates of the image of point RR after the transformations described (a 180180^\circ counterclockwise rotation followed by a translation 3 units to the left), we proceed step by step:


1. Identify the coordinates of point RR.

From the graph, the coordinates of RR are approximately (1,7)(1, -7).


2. Rotate 180180^\circ counterclockwise.

A 180180^\circ rotation around the origin transforms any point (x,y)(x, y) to (x,y)(-x, -y).
Applying this to R(1,7)R(1, -7):

(x,y)(x,y)(x, y) \to (-x, -y) (1,7)(1,7)(1, -7) \to (-1, 7)

Thus, after the 180180^\circ rotation, the new coordinates of RR are (1,7)(-1, 7).


3. Translate the point 3 units to the left.

A translation to the left by 3 units decreases the xx-coordinate by 3 while leaving the yy-coordinate unchanged.

Starting from (1,7)(-1, 7):

(x,y)(x3,y)(x, y) \to (x - 3, y) (1,7)(13,7)(-1, 7) \to (-1 - 3, 7) (4,7)(-4, 7)

Thus, the final coordinates of RR after the transformations are (4,7)(-4, 7).


Final Answer:

The coordinates of the image of point RR are (4,7)(-4, 7).


Do you want me to show a graphical explanation of the transformations or any further clarifications?


Related Questions:

  1. What are the coordinates of other vertices after the same transformations?
  2. How does a (

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Math Problem Analysis

Mathematical Concepts

Transformations in Geometry
Rotations
Translations
Coordinate Plane

Formulas

180° Rotation: (x, y) → (-x, -y)
Translation left by k units: (x, y) → (x - k, y)

Theorems

Rotation Theorem for 180°
Translation Theorem

Suitable Grade Level

Grade 8-10