One vertex of a polygon is located at (3, –2). After a rotation, the vertex is located at (2, 3).

Which transformations could have taken place? Select two options.

R0, 90°
R0, 180°
R0, 270°
R0, –90°
R0, –270°

1 answer

To determine which rotations could have transformed the vertex from (3, –2) to (2, 3), we can apply the rotation transformations to the original vertex.

  1. Rotation \( R_{0, 90^\circ} \): \[ x' = -y, \quad y' = x \] Applying this to (3, –2): \[ x' = -(-2) = 2, \quad y' = 3 \] Resulting point: (2, 3) - This is a valid transformation.

  2. Rotation \( R_{0, 180^\circ} \): \[ x' = -x, \quad y' = -y \] Applying this to (3, –2): \[ x' = -3 = -3, \quad y' = -(-2) = 2 \] Resulting point: (-3, 2) - This is not a valid transformation.

  3. Rotation \( R_{0, 270^\circ} \): \[ x' = y, \quad y' = -x \] Applying this to (3, –2): \[ x' = -2, \quad y' = -3 \] Resulting point: (-2, -3) - This is not a valid transformation.

  4. Rotation \( R_{0, -90^\circ} \): \[ x' = y, \quad y' = -x \] Applying this to (3, –2): \[ x' = -2, \quad y' = -3 \] Resulting point: (-2, -3) - This is not a valid transformation.

  5. Rotation \( R_{0, -270^\circ} \) (equivalent to \( R_{0, 90^\circ} \)): \[ x' = -y, \quad y' = x \] Applying this to (3, –2): \[ x' = -(-2) = 2, \quad y' = 3 \] Resulting point: (2, 3) - This is a valid transformation.

Based on this analysis, the transformations that could have taken place are:

  • \( R_{0, 90^\circ} \)
  • \( R_{0, -270^\circ} \)

So, the correct options are:

  • R0, 90°
  • R0, –270°