Pearson Geometry Common Core, 2011
PG
Pearson Geometry Common Core, 2011 View details
2. Reflections
Continue to next subchapter

Exercise 34 Page 559

If the point is on the line of reflection, then the image of this point is itself.

(0,0)

Practice makes perfect

We want to find the image of the given point after two reflections. Let's consider each of them, one at a time.

Reflection Across Line l_1

First, we will reflect the point O(0,0) across the x -axis. To do this, let's begin by plotting the point and drawing the line of reflection on a coordinate plane.

Point O lies on the line of reflection. Therefore, the image of O is itself.

Reflection Across Line l_2

We will now reflect the point (0,0) across the y -axis using the same reasoning as we did to perform the first reflection. Let's identify the y -axis as the new line of reflection.

Once again, the point (0,0) lies on the line of reflection. Therefore, the image of (0,0) is itself. The image of the point O(0,0) after two reflections is (0,0).