Question

segment ab is congruent to segment ab. this statement shows the ______ property. transitive symmetric reflexive substitution

Explanation:

The reflexive property of congruence (or equality) states that any geometric figure (or quantity) is congruent (or equal) to itself. Here, segment \( AB \) is congruent to itself, which matches the reflexive property. The transitive property involves three elements (\( a \cong b \), \( b \cong c \) implies \( a \cong c \)), the symmetric property is \( a \cong b \) implies \( b \cong a \), and substitution is about replacing a quantity with an equal one. So the correct property here is reflexive.

Answer:

reflexive