Which of the following transformations is NOT listed among the four types?

The correct answer is that distortions are not one of the four basic types of transformations typically covered in GCSE Maths. In the context of geometric transformations, the four main types are translations, rotations, reflections, and dilations.

To understand why distortions do not qualify, it's essential to look at the characteristics of the other transformations.

Translations involve moving a shape from one location to another without changing its orientation, while rotations involve turning a shape around a fixed point by a certain angle. Reflections create a mirror image of a shape across a line of symmetry. Each of these transformations preserves the shape and size of the figures involved.

Distortions, on the other hand, would imply changing the shape or proportion of an object in a way that does not maintain these characteristics, such as stretching or compressing. This concept can refer to more advanced transformations but does not fit into the fundamental categories defined for the level of study in GCSE Maths.

Therefore, while translations, rotations, and reflections are foundational transformations that maintain the properties of figures, distortions are not part of the foundational curriculum for transformations in GCSE Maths.