Rigid motions
Rigid motions occur when an object moves but maintains its shape and size
We can mention the following rigid motions:
• Translations
,
• Reflections
,
• Rotations
If a translation occurs, one of the four options does not correspond to other rigid motions.
If we translate an object, but we don't rotate it or reflect it, their lines cannot be perpendicular. thus the option (4) is the correct choice