Question

2 circle the sets of lines that appear to be perpendicular to each other.

Explanation:

Step1: Recall the definition of perpendicular lines

Perpendicular lines are two lines that intersect at a right angle ($90^{\circ}$).

Step2: Analyze each set of lines

• The first set: One vertical line and one horizontal line. They intersect at a right angle.
• The second set: Parallel lines (do not intersect at a right angle).
• The third set: Intersecting but not at a right angle.
• The fourth set: Intersect at a right angle.
• The fifth set: Intersect at a right angle.

Answer:

Circle the first, fourth, and fifth sets of lines.