Which of the following describes congruent shapes?

Congruent shapes are defined as those that are identical in both size and shape. This means that if one shape can be transformed into the other through rotation, reflection, or translation, they are considered congruent.

For example, if you have two triangles that have the exact same lengths for each of their sides and the same measure for each of their angles, they are congruent. Thus, option A accurately describes this property of congruence, confirming that congruent shapes maintain identical dimensions and structure.

The other options do not align with the definition of congruence. For instance, stating that shapes can be of the same shape but different sizes would imply that they are similar, not congruent. Similarly, the idea that certain shapes cannot be reflected or that they differ in angles and size also goes against the core principle of congruence, where congruent shapes must have congruent angles and side lengths.