Math Problem Statement

Point P(2, -3) is reflected along different lines. What are the coordinates of the reflected points and the line equations?

Solution

Let's break down and solve the parts of the problem from the image:

(a) Reflection of Point P(2,3)P(2, -3) to P(2,3)P'(2, 3)

Here, point P(2,3)P(2, -3) is reflected to P(2,3)P'(2, 3). The reflection changes the yy-coordinate while keeping the xx-coordinate constant. This suggests that the line of reflection is the x-axis. Therefore, L1L_1, the line of reflection, is the x-axis.

Answer for (a): The line of reflection is L1:y=0L_1: y = 0 (the x-axis).

(b) Reflection of P(2,3)P'(2, 3) to PP''

Point PP' is reflected along line L2L_2, which is perpendicular to L1L_1 (the x-axis) and passes through the origin. Since L2L_2 is perpendicular to the x-axis, it must be the y-axis. So, we need to reflect P(2,3)P'(2, 3) over the y-axis.

Reflection over the y-axis changes the xx-coordinate, flipping its sign, while the yy-coordinate remains unchanged.

Therefore, reflecting P(2,3)P'(2, 3) over the y-axis gives P(2,3)P''(-2, 3).

Answer for (b): The coordinates of PP'' are (2,3)(-2, 3).

(c) Point of intersection of L1L_1 and L2L_2

From parts (a) and (b), we know that:

  • L1L_1 is the x-axis y=0y = 0,
  • L2L_2 is the y-axis x=0x = 0.

The intersection of the x-axis and y-axis occurs at the origin.

Answer for (c): The point of intersection of L1L_1 and L2L_2 is (0,0)(0, 0).

(d) Reflection of PP to PP'''

Now, point P(2,3)P(2, -3) is reflected through the origin (the point of intersection from part (c)). Reflecting a point through the origin means both the xx- and yy-coordinates are flipped in sign.

Reflecting P(2,3)P(2, -3) through the origin gives P(2,3)P'''(-2, 3).

Answer for (d): The coordinates of PP''' are (2,3)(-2, 3).

Comment on the location of PP'' and PP'''

Notice that PP'' and PP''' both have the same coordinates: (2,3)(-2, 3). This implies that the reflections described in parts (b) and (d) both result in the same point.


Do you want more details or have any questions?

Here are some related questions:

  1. What is the geometric interpretation of reflecting over the y-axis?
  2. Can you generalize how to reflect a point through any given line?
  3. What are the equations of lines perpendicular to the x-axis or y-axis?
  4. How can we reflect a point through the origin using vector notation?
  5. How would the results change if the line of reflection were not the x- or y-axis?

Tip: Reflections over lines or points can be handled by changing the signs of coordinates, depending on the axis or point of reflection.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Reflections
Lines and Points

Formulas

Reflection over x-axis: P(x, y) -> P'(x, -y)
Reflection over y-axis: P(x, y) -> P''(-x, y)
Reflection through the origin: P(x, y) -> P'''(-x, -y)

Theorems

Reflection properties in coordinate geometry

Suitable Grade Level

Grade 9-10