# Chapter 2 - Reasoning and Proof - 2-3 Biconditionals and Definitions - Practice and Problem-Solving Exercises - Page 103: 46

$\angle A$ and $\angle B$ are a linear pair if and only if they are adjacent and supplementary angles.

#### Work Step by Step

The double arrow indicates a biconditional. A biconditional includes an "if and only if" phrase between two statements.

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