Two lines that meet to form a right angle are described as which?

• A. Intersecting
• B. Perpendicular
• C. Similar
• D. Parallel

Answer: (B)

Perpendicular describes two lines that meet to form a right angle. A right angle is a 90-degree angle, so when two lines cross and the angle between them is 90 degrees, they are perpendicular. If lines simply cross, they could form angles that are not 90 degrees, which is just intersecting. Similar relates to shapes having the same shape or proportions, not about how lines meet, and parallel means lines that run in the same direction and never meet.