What two rigid transformations were performed on figure ABCD to produce the congruent figure WXYZ ? (1 point) Responses ABCD was first shifted 3 units to the left and 5 units up, then rotated 90° (counterclockwise). upper A upper B upper C upper D was first shifted 3 units to the left and 5 units up, then rotated 90 degrees (counterclockwise). ABCD was first shifted 3 units to the left and 5 units up, then rotated −90° (clockwise). upper A upper B upper C upper D was first shifted 3 units to the left and 5 units up, then rotated negative 90 degrees (clockwise). ABCD was first rotated 90° (counterclockwise), then shifted 3 units to the left and 5 units up. upper A upper B upper C upper D was first rotated 90 degrees (counterclockwise), then shifted 3 units to the left and 5 units up. ABCD was first rotated −270° (clockwise), then shifted 3 units to the left and 5 units up.

1 answer

To determine the correct sequence of transformations that produce congruent figures ABCD and WXYZ, we need to analyze the given options based on the properties of rigid transformations.

  1. Translation (shifting): This movement slides the figure in a given direction without changing its shape or orientation.
  2. Rotation: This turns the figure around a specific point by a certain angle.

Now let’s examine the options:

  • Option 1: ABCD was first shifted 3 units to the left and 5 units up, then rotated 90° (counterclockwise).
  • Option 2: ABCD was first shifted 3 units to the left and 5 units up, then rotated −90° (clockwise).
  • Option 3: ABCD was first rotated 90° (counterclockwise), then shifted 3 units to the left and 5 units up.
  • Option 4: ABCD was first rotated −270° (clockwise), then shifted 3 units to the left and 5 units up.

To find which option accurately describes the transformation that produces figure WXYZ from figure ABCD, we need to consider the impact of both translation and rotation:

  • If the first transformation is a translation followed by a rotation, it would alter the position and orientation of the figure appropriately and is commonly used in congruent transformations.

  • Similarly, if we rotate first followed by a translation, it also can yield congruency depending on the specifics of the figures involved.

Considering these insights:

Option 1 or 2 (translation first, then rotation) would typically maintain congruence, but we have to consider the direction of the rotation too.

In your case, we can't see the figures directly, but generally:

  • If you're shifting (translating) a figure (3 units left, 5 units up) and then rotating it 90 degrees counterclockwise, that's a common transformation path.

Therefore, the most typical sequence to maintain congruency would often be option 1: "ABCD was first shifted 3 units to the left and 5 units up, then rotated 90° (counterclockwise)."

If your figures and their requirements indicate a different sequence, that might alter the response, but elsewhere in rigid transformations, this response tends to hold.