Pentagon ABCDE is similar to Pentagon VWXYZ.

ABCDE's perimeter is 36 m. VWXYZ's perimeter is 18 m.
WHich sequence of transformations can be applied to ABCDE to produce VWXYZ?

a diiation with a scale factor of 2 followed by a rotation of 90 degrees clockwise
a translation to the right followed by a dilation with a scale factor of 1/2
a reflection over a vertical line followed by a dilation with a scale factor of 1/2
a rotation of 180 degrees counterclockwise followed by a dilation with a scale factor of 2

1 answer

To transform Pentagon ABCDE into Pentagon VWXYZ while maintaining their similarity, we need to consider the scale factor between their perimeters.

The perimeter of ABCDE is 36 m and the perimeter of VWXYZ is 18 m. To find the scale factor, we can divide the perimeter of ABCDE by the perimeter of VWXYZ:

\[ \text{Scale Factor} = \frac{\text{Perimeter of ABCDE}}{\text{Perimeter of VWXYZ}} = \frac{36}{18} = 2 \]

Since VWXYZ is smaller than ABCDE, the appropriate scale factor for the transformation will be \(\frac{1}{2}\) (indicating that VWXYZ is half the size of ABCDE, not bigger).

Now let's analyze the given options for transformations:

  1. A dilation with a scale factor of 2 followed by a rotation of 90 degrees clockwise: This will not produce Pentagon VWXYZ because the dilation is incorrect (it enlarges rather than shrinks).

  2. A translation to the right followed by a dilation with a scale factor of 1/2: While the dilation is correct (it will reduce the size of the pentagon), the translation may not be necessary depending on the position of the pentagons.

  3. A reflection over a vertical line followed by a dilation with a scale factor of 1/2: This is a valid sequence since the reflection can reposition the pentagon, and the dilation will properly shrink it down to the appropriate size.

  4. A rotation of 180 degrees counterclockwise followed by a dilation with a scale factor of 2: Similar to the first option, the dilation is incorrect (it enlarges rather than reduces).

Based on the understanding from the options provided, the best choice is:

A reflection over a vertical line followed by a dilation with a scale factor of 1/2.