Triangle XYZ is rotated to create the image triangle X'Y'Z'.

On a coordinate plane, 2 triangles are shown. The first triangle has points X (negative 2, 2), Y (1, 2), Z (0, 4). The second triangle has points X prime (2, negative 2), Y prime (negative 1, negative 1), Z prime (0, negative 4).
Which rules could describe the rotation? Select two options.

R0, 90°
R0, 180°
R0, 270°
(x, y) → (–y, x)

1 answer

To find the rules that describe the rotation from triangle XYZ to triangle X'Y'Z', we can analyze the coordinates of the points in both triangles.

The vertices of triangle XYZ are:

  • \(X(-2, 2)\)
  • \(Y(1, 2)\)
  • \(Z(0, 4)\)

The vertices of triangle X'Y'Z' are:

  • \(X'(2, -2)\)
  • \(Y'(-1, -1)\)
  • \(Z'(0, -4)\)

Analyzing the Points:

  1. For Point X to X':

    • Original \(X(-2, 2)\) transforms into \(X'(2, -2)\).
    • This transformation can be represented as \((x, y) \rightarrow (–y, x)\).

    Applying this transformation:

    • For \(X(-2, 2)\): \[ (–2, 2) \rightarrow (-2, -2) \text{ which corresponds to } X'(2, -2). \]
  2. For Point Y to Y':

    • Original \(Y(1, 2)\) transforms into \(Y'(-1, -1)\).
    • Applying \((x, y) \rightarrow (–y, x)\): \[ (1, 2) \rightarrow (–2, 1) \text{ which is not equal to } Y'(-1, -1). \]

    However, the rotation can involve multiple transformations, and other options need consideration.

Evaluating Rotations:

  • 90° Rotation (R0, 90°):

    • The points transformed should follow the rule \((x, y) \rightarrow (-y, x)\).
    • Evaluating:
      • \(X(-2, 2) \rightarrow (-2, -2)\),
      • \(Y(1, 2) \rightarrow (-2, 1)\),
      • \(Z(0, 4) \rightarrow (-4, 0)\).
  • 180° Rotation (R0, 180°):

    • The points transformed by \((x, y) \rightarrow (-x, -y)\).
    • Evaluating:
      • \(X(-2, 2) \rightarrow (2, -2)\),
      • \(Y(1, 2) \rightarrow (-1, -2)\),
      • \(Z(0, 4) \rightarrow (0, -4)\).

The transformation holds for:

  • \(X(-2, 2) \rightarrow (2, -2)\),
  • \(Y(1, 2) \rightarrow (-1, -2)\),
  • \(Z(0, 4) \rightarrow (0, -4)\) correlating with \(Y'\).

Conclusion:

After analyzing, the rules that could describe the rotation of triangle XYZ to triangle X'Y'Z' are:

  1. R0, 180°
  2. (x, y) → (–y, x)

Thus, the selected options are R0, 180° and (x, y) → (–y, x).