Which term describes the shape prior to a transformation?

The term that describes the shape prior to a transformation is "Pre-image." In the context of geometry and transformations, the pre-image refers to the original figure before any changes, such as translations, rotations, reflections, or dilations, are applied to it. Once the transformation takes place, the resulting shape is known as the image. Understanding this distinction is essential for grasping the concepts of geometric transformations, as it helps in visualizing how the pre-image relates to the final form or image after the transformation has occurred.

In contrast, terms like "image," "target shape," or "original shape" may not accurately capture the specific context of geometry concerning transformations, making "pre-image" the most precise choice for identifying the shape before it undergoes any changes.