Shape A is reflected in the line with equation $x = 2$ to give shape B - Edexcel - GCSE Maths - Question 18 - 2022 - Paper 3

Subsequently, shape B is reflected in the line $x = 6$. Similarly, every point of shape B moves to the opposite side of the line while staying equidistant from it, resulting in shape C.

To describe the single transformation that maps shape A onto shape C, we can consider the overall transformation effect. The transformation can be viewed as a cumulative reflection. First, we reflect shape A across the line $x = 2$, and then we reflect the resulting shape B across the line $x = 6$. This can also be interpreted as a single reflection through a line that is equidistant from both lines (effectively translating the reflection points). The result can be described as a single reflection through an effective line $x = 4$ (the midpoint between $x = 2$ and $x = 6$) which directly maps shape A to shape C.