Question

line segment \\( \overline { c d } \\) is shown on the grid. it will be reflected over the dotted horizontal line. which statement best describes the length of the resulting image?
a) the length of the image is twice as big as the original
b) the length of the image is half as big as the original
c) the length of the image is two units longer than the original
d) the length of the image is the same as the original
answer:

Explanation:

Reflection is a rigid transformation. Rigid transformations (like reflections) preserve the shape and size of the figure. So, the length of a line segment remains unchanged after reflection.

Answer:

d) The length of the image is the same as the original.