Question

1. ________ lines cross at a right angle.

options:

• perpendicular
• intersecting
• parallel
• slanted

Explanation:

To solve this, we analyze each option:

• "Perpendicular" lines are defined as lines that intersect at a right angle (90 degrees).
• "Intersecting" lines just cross each other but not necessarily at a right angle.
• "Parallel" lines never intersect.
• "Slanted" lines are just lines with a slope, not specifically crossing at a right angle.

So the correct term for lines that cross at a right angle is "Perpendicular".

Answer:

A. Perpendicular