Tool

Reflection Over y = x + b

Move a shifted diagonal mirror line and point to see reflection updates in real time for $y = x + b$ .

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Inputs: Point coordinates x and y plus shift b for the mirror line y = x + b.

Outputs: Live coordinates for P and P′, midpoint on the mirror line, and matching |dx|/|dy| helper distances.

Used for: Use for coordinate-geometry reflections when the mirror is a translated diagonal line.

geometrytransformationsreflectioncoordinates