Question

Which of the following statements is true about rays?

Answer 1

Answer:  B. They are one-dimensional objects

This applies to line segments and lines as well.

One dimensional objects are such that they only have one component to them when it comes to determining a location on that object.

For instance, a number line is one dimensional because we only need one number to determine where a location is.

A ray is effectively a half-line, or put another way, a line is the combination of two rays glued together. Basically a ray points forever in one direction only, as a line will point in two opposite directions.

Extra side notes:

• I can't think of any zero dimensional objects off the top of my head.
• 3D space is a 3 dimensional object because we need 3 coordinates to determine an exact location.
• A flat 2D plane is a 2 dimensional object because we need 2 coordinates to determine a location.