AIR MATH

Math Question

Heng tried to define a reflection across line \( r \).
- Any point \( N \) on line \( r \) maps to itself.
- Any point \( M \) not on the line of reflection maps to a point \( M^{\prime} \) such that the midpoint \( L \) of \( M M^{\prime} \) is on line \( r . \)

Which counterexample shows that Heng's definition does not fully define a reflection?
Choose 1 answer:
(A)
(B)
(c)
(D) Heng fully defined a reflection.

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