What is the length of the unknown side?
2 answers:
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Reflection across the line y=x simply swaps the x and y coordinates.
K'(-2, -5), A'(1, -4), I'(-1, 0), J'(-4, -2)
K'(-2, -5), A'(1, -4), I'(-1, 0), J'(-4, -2)