What type of symmetry is created when an object can be divided into two identical halves?

Reflectional symmetry is defined as the type of symmetry that occurs when a shape or object can be divided into two identical halves by a single line, known as the line of symmetry. This means that one half of the object is a mirror image of the other half. For example, if you were to fold a symmetrical butterfly along its centerline, both sides would match perfectly, demonstrating reflectional symmetry.

In contrast, other types of symmetry involve different relationships. Rotational symmetry refers to a shape that looks the same after being rotated by a certain degree. Translational symmetry involves a shape that can be moved from one position to another without changing its appearance, and radial symmetry is evident in objects like flowers or starfish, where patterns radiate out from a central point. Thus, reflectional symmetry is the correct answer to the question, as it specifically addresses the criteria of dividing an object into two identical halves.