Question

the movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer.identify a set of parallel and a set of perpendicular lines in this image.$overleftrightarrow{ad} parallel overleftrightarrow{eh}$, $overleftrightarrow{eh} perp overleftrightarrow{bf}LXB0overleftrightarrow{bf} parallel overleftrightarrow{cg}$, $overleftrightarrow{ad} perp overleftrightarrow{eh}$$overleftrightarrow{ad} parallel overleftrightarrow{eh}$, $overleftrightarrow{bf} perp overleftrightarrow{cg}$

Explanation:

1. First, identify parallel lines: Lines that run in the same direction and never intersect are parallel. $\overleftrightarrow{AD}$ and $\overleftrightarrow{EH}$ have matching bidirectional arrows, so they are parallel. $\overleftrightarrow{BF}$ and $\overleftrightarrow{CG}$ also have matching bidirectional arrows, so they are parallel.
2. Next, identify perpendicular lines: Lines that intersect at a right angle (marked by the square symbol) are perpendicular. $\overleftrightarrow{AD}$ (and its parallel $\overleftrightarrow{EH}$) intersects $\overleftrightarrow{BF}$ (and its parallel $\overleftrightarrow{CG}$) at right angles, so $\overleftrightarrow{EH} \perp \overleftrightarrow{BF}$ and $\overleftrightarrow{AD} \perp \overleftrightarrow{CG}$ are valid, but we check the options.
3. Match to the options: The option that correctly pairs a parallel set and a perpendicular set is $\overleftrightarrow{AD} \parallel \overleftrightarrow{EH}$, $\overleftrightarrow{EH} \perp \overleftrightarrow{BF}$.

Answer:

$\boldsymbol{\overleftrightarrow{AD} \parallel \overleftrightarrow{EH}, \overleftrightarrow{EH} \perp \overleftrightarrow{BF}}$