Which line is NOT a line of symmetry

To determine which line is NOT a line of symmetry, we need to understand that a line of symmetry is a line that divides a shape into two identical parts that are mirror images of each other.

If you can visually assess the shape related to each line:

– If one line divides the shape into two non-identical parts, then that line is NOT a line of symmetry.

In the absence of specific visual information about lines a, b, c, and d, I recommend checking for symmetry by on either side of each line—whichever does not match is the answer.

If you want a more detailed analysis, feel free to ask more specific questions or visit the extended services page for in-depth help!