Describe a Reflection
A reflection is a flip of a figure across a line, called the line of reflection. The image stays the same size and shape, but its orientation changes.
1) Identify the mirror line
Look for the line that acts like a mirror. Every point and its image should be the same distance from this line, on opposite sides.
2) Compare matching points
For each vertex or labeled point:
- Measure or count its perpendicular distance to the line.
- Place the reflected point the same distance on the other side.
- Keep the point directly across the line, not slid left or right.
3) Describe the reflection clearly
A complete description usually includes:
- the line of reflection if it is given or can be named,
- the fact that the figure is reflected or flipped, and
- any coordinate or geometric detail that identifies the image.
4) Check your work
A correct reflection has these features:
- each point and image are symmetric about the mirror line,
- corresponding distances to the line are equal,
- side lengths and angles are unchanged.
If the answer involves coordinates, simplify the final result and write the image points neatly.