Question

choose the correct answer. which of the following means these lines are perpendicular?

Explanation:

Step1: Recall the symbol for perpendicular

The symbol for perpendicular is $\perp$.

Step2: Check each option

• First option: $\overleftrightarrow{AB}\perp\overleftrightarrow{XY}$ uses the perpendicular symbol.
• Second option: $\overleftrightarrow{AB}=\overleftrightarrow{XY}$ uses the equality symbol (not for perpendicularity).
• Third option: $\overleftrightarrow{AB}\parallel\overleftrightarrow{XY}$ uses the parallel symbol (not for perpendicularity).

Answer:

First option: $\overleftrightarrow{AB}\perp\overleftrightarrow{XY}$