Math Problem Statement

A triangle has vertices at A (−2, −2), B (−1, 1), and C (3, 2). Which of the following transformations produces an image with vertices A′ (2, −2), B′ (1, 1), and C′ (−3, 2)?

(x, y) → (x, −y) (x, y) → (−y, x) (x, y) → (−x, y) (x, y) → (y, −x)

Solution

To determine which transformation produces the given result, let us analyze how the original vertices are transformed to the new vertices:

Original Vertices and Transformed Vertices:

  1. A (−2, −2)A′ (2, −2)
  2. B (−1, 1)B′ (1, 1)
  3. C (3, 2)C′ (−3, 2)

Testing the Transformations:

Option 1: (x,y)(x,y)(x, y) → (x, −y)

  • A(−2, −2) → (−2, 2) → Incorrect.
  • This does not match the transformation.

Option 2: (x,y)(y,x)(x, y) → (−y, x)

  • A(−2, −2) → (2, −2) → Matches!
  • B(−1, 1) → (−1, 1) → Matches!
  • C(3, 2) → (−3, 2) → Matches!
  • This transformation is consistent with all vertices.

Option 3: (x,y)(x,y)(x, y) → (−x, y)

  • A(−2, −2) → (2, −2) → Incorrect.
  • This does not match the transformation.

Option 4: (x,y)(y,x)(x, y) → (y, −x)

  • A(−2, −2) → (−2, 2) → Incorrect.
  • This does not match the transformation.

Correct Answer:

The transformation that produces the given image is: (x,y)(y,x)(x, y) → (−y, x).

Would you like further details or additional examples to explore this concept?


Related Questions:

  1. How do you verify transformations using matrix representation?
  2. What is the geometric meaning of (y,x)(−y, x) in terms of rotation?
  3. How do transformations affect the area of a triangle?
  4. How can you identify a transformation when given a specific shape or figure?
  5. What are other common transformations involving reflections and rotations?

Tip: To analyze transformations effectively, always test one vertex at a time systematically.

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Math Problem Analysis

Mathematical Concepts

Geometry
Coordinate Transformations
Reflections and Rotations

Formulas

(x, y) → (−y, x)
(x, y) → (x, −y)
(x, y) → (−x, y)
(x, y) → (y, −x)

Theorems

Properties of Coordinate Transformations
Triangle Transformation and Mapping

Suitable Grade Level

Grades 9-11