Final answer:
The rigid motions among the given transformations are reflection, rotation, and translation. These transformations do not alter the size or shape of the figure. Dilation is not a rigid motion as it changes the size of the figure.
Step-by-step explanation:
The question asks about which transformations are considered rigid motions. In geometry, rigid motions include transformations that preserve distance and angle measures. Therefore, the types of rigid motions from the choices given are:
- Reflection: This is a flip over a line where the shape remains the same size and orientation is reversed.
- Rotation: This involves turning a figure around a point without changing its size or shape.
- Translation: This is a slide of the figure in any direction where size and shape are not altered.
The one option that is not a rigid motion is dilation, as it changes the size of the figure by a scale factor, and therefore does not meet the criteria of preserving distances exactly.