California Assessment of Student Performance and Progress (CAASPP) Math Practice Exam

Which of the following is not a perpendicular geometric figure?

1. Lines that form a right angle

2. Lines that meet at any angle

3. Lines that are vertical and horizontal

4. Lines that create an intersection

The correct answer is: Lines that meet at any angle

The correct answer highlights the definition of perpendicularity in geometry. Perpendicular lines are specifically those that intersect to form a right angle (90 degrees). Lines that meet at any angle can include acute angles, obtuse angles, or right angles, meaning they do not necessarily meet at a right angle. Thus, this option does not conform to the requirement of forming a right angle that characterizes perpendicular figures. Other options, such as lines that form a right angle and lines that are vertical and horizontal, exemplify the concept of perpendicularity, as they specifically illustrate the condition of intersecting at 90 degrees. Additionally, lines that create an intersection also encompass perpendicular lines, but not exclusively, since any two lines can intersect at varying angles.