Math Problem Statement

The point (-5, 5) is the image of a point that was rotated 180° using the center (0, 0). What are the coordinates of the original point before the rotation? Enter the coordinates as (x, y).

Solution

The question in the image asks about the coordinates of a point before a 180° rotation using the origin (0,0)(0, 0).

Given:

  • The point (5,5)(-5, 5) is the image of the original point after being rotated 180° around the origin (0,0)(0, 0).

Rotation of 180°:

A 180° rotation around the origin transforms a point (x,y)(x, y) to (x,y)(-x, -y).

Let (x,y)(x, y) be the original point before the rotation. After a 180° rotation, this point would become (x,y)(-x, -y).

From the problem: (x,y)=(5,5)(-x, -y) = (-5, 5) So: x=5,y=5x = 5, \quad y = -5

Thus, the coordinates of the original point before the rotation are (5,5)(5, -5).

Would you like further details, or do you have any other questions?

Related Questions:

  1. What happens to a point after a 90° counterclockwise rotation around the origin?
  2. How does a 270° clockwise rotation around the origin transform a point (x,y)(x, y)?
  3. Can you explain how to apply a reflection over the y-axis to a point?
  4. What is the effect of rotating a point 360° around the origin?
  5. How would you find the original point if it were rotated 45° instead of 180°?

Tip:

When dealing with transformations like rotations, it helps to visualize the rotation on a coordinate plane or use formulas for standard rotation angles (90°, 180°, 270°).

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Math Problem Analysis

Mathematical Concepts

Geometry
Coordinate Plane
Rotations

Formulas

Rotation by 180°: (x, y) -> (-x, -y)

Theorems

Rotation Theorem for 180° about the origin

Suitable Grade Level

Grades 9-10