Question

1. look at the figure below. what two lines are perpendicular?

a

b

c

d

Explanation:

Step1: Recall the definition of perpendicular lines

Perpendicular lines intersect at a right - angle (\(90^{\circ}\)).

Step2: Analyze each option

• Option A: \(\overleftrightarrow{FG}\) and \(\overleftrightarrow{HJ}\) are parallel (vertical lines), not perpendicular.
• Option B: \(\overleftrightarrow{FG}\) is vertical and \(\overleftrightarrow{MN}\) is horizontal. Vertical and horizontal lines intersect at \(90^{\circ}\).
• Option C: \(\overleftrightarrow{HJ}\) and \(\overleftrightarrow{KL}\) are not at \(90^{\circ}\) to each other.
• Option D: \(\overleftrightarrow{KL}\) and \(\overleftrightarrow{MN}\) are not at \(90^{\circ}\) to each other.

Answer:

B. \(\overleftrightarrow{FG}\), \(\overleftrightarrow{MN}\)