Math Problem Statement

Point A is graphed at (-2, 1). Using the pencil, plot the image of point A after a 270° clockwise rotation about (3, -3).

Solution

To solve this problem, we need to determine the image of point AA located at (2,1)(-2, 1) after a 270270^\circ clockwise rotation about the point (3,3)(3, -3).

Here’s the step-by-step approach:

  1. Translate the Points: Shift the entire setup so that the center of rotation, (3,3)(3, -3), moves to the origin. This is done by translating both points by (3,+3)(-3, +3):

    • New coordinates for AA after translation: (23,1+3)=(5,4)(-2 - 3, 1 + 3) = (-5, 4)
  2. Rotate 270270^\circ Clockwise: A 270270^\circ clockwise rotation around the origin is equivalent to a 9090^\circ counterclockwise rotation. The transformation rule for a 9090^\circ counterclockwise rotation is: (x,y)(y,x)(x, y) \rightarrow (-y, x) Applying this to (5,4)(-5, 4): (5,4)(4,5)(-5, 4) \rightarrow (-4, -5)

  3. Translate Back: Now, move the rotated point back to the original position by translating it by (+3,3)(+3, -3): (4+3,53)=(1,8)(-4 + 3, -5 - 3) = (-1, -8)

Thus, the image of point AA after a 270270^\circ clockwise rotation about (3,3)(3, -3) is (1,8)(-1, -8).

Would you like more details on any step, or do you have questions?


Here are 5 related questions you might explore:

  1. How would the result change with a 9090^\circ clockwise rotation instead?
  2. What is the effect of rotating a point 180180^\circ about a given point?
  3. How can rotation transformations be applied to a line segment or shape instead of a single point?
  4. How does translating affect the coordinates before and after rotation?
  5. Can rotation transformations be applied to three-dimensional coordinates?

Tip: When working with rotation, translation can simplify the process by making the rotation center the origin. This makes applying rotation rules straightforward.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Rotations in the Coordinate Plane
Transformations

Formulas

Translation formula: (x, y) -> (x - h, y - k) for translating to origin and (x + h, y + k) for translating back
Rotation formula: 270° clockwise rotation around the origin is equivalent to a 90° counterclockwise rotation: (x, y) -> (-y, x)

Theorems

Rotation about a Point

Suitable Grade Level

Grades 9-10