Which concept describes the lines of intersection created from three mutually perpendicular planes?

Which concept describes the lines of intersection created from three mutually perpendicular planes?

• A. Density
• B. Principal Axes
• C. Volume
• D. Acute Triangle

Answer: (B)

Lines formed by the intersection of three planes that are mutually perpendicular define the three primary directions in 3D space, crossing at a common point and forming a right-handed set. These three lines establish the reference directions for describing position, orientation, and distribution within a body, so they’re called the principal axes. In other words, they are the x, y, and z directions that give you a standard coordinate frame in space. Density and volume describe material properties or how much space a substance occupies, not the orientation of space itself, and an acute triangle is a 2D shape, not related to lines of intersection in three dimensions.

Lines formed by the intersection of three planes that are mutually perpendicular define the three primary directions in 3D space, crossing at a common point and forming a right-handed set. These three lines establish the reference directions for describing position, orientation, and distribution within a body, so they’re called the principal axes. In other words, they are the x, y, and z directions that give you a standard coordinate frame in space.

Density and volume describe material properties or how much space a substance occupies, not the orientation of space itself, and an acute triangle is a 2D shape, not related to lines of intersection in three dimensions.