Answer the question about rigid motions.
For two-dimensional objects moving in a plane, there are four possible rigid motions. Reflections and rotations are two of the possibilities. What are the other two types of rigid motions?
◦ translations and rotary reflections
◦ glide reflections and rotary reflections
◦ glide reflections and screw displacements
◦ translations and glide reflections
◦ translations and screw displacements