Exercise 12 Page 392

Let's begin by plotting the points on a coordinate plane. Remember that the first value represents the $x\text{-coordinate}$ and the second is the $y\text{-coordinate}.$

To determine if $\overline{AB}$ and $\overline{CD}$ are congruent, we should compare the length between $A$ and $B$ to the length between $C$ and $D.$ The length can be calculated by evaluating the absolute value of the difference between the $x\text{-}$ or $y\text{-}$values, depending on if it's a horizontal or vertical line.