Which term describes having the same shape, size, and position on both sides of a dividing line?

• A. Symmetry
• B. Rotation
• C. Ray
• D. Vertex

Answer: (A)

Symmetry is when one side mirrors the other across a line, so both sides have the same shape, size, and position relative to that line. If you imagine folding the figure along the dividing line, the two halves would line up exactly because each point on one side has a corresponding point the same distance away on the opposite side. That mirror-like relationship is what makes symmetry the correct term here.

The other ideas describe different concepts: rotation is turning around a point, a ray is a part of a line that starts at a point and goes off in one direction, and a vertex is a corner where edges meet.