Why would a ray be an undefined term???

Question

lexi724 · Answer

and my only choices are  has no width or depth

 is described using an undefined term

 has an informal definition

 travels forever in one direction

skullpatrol · Answer

Any ideas?

lexi724 · Answer

i thought it was it travels forever
 in one direction and it told me that was wrong

skullpatrol · Answer

that would be a description of a ray, right?

lexi724 · Answer

correct.... so do you think that would make it "having an informal definition
??"

skullpatrol · Answer

Would that make it "undefined"?

lexi724 · Answer

i reckon not...

skullpatrol · Answer

In math "undefined" has a precise meaning...

lexi724 · Answer

it means impossible or non existing if im right...

lexi724 · Answer

i need to submit  in 2mins and im not sure of an answer

lexi724 · Answer

is it no width or depth???

plainntall · Answer

I thought a ray was a defined term.  I thought the only undefined terms were point, line and plane.  A ray is defined by line in that it is a line with an endpoint that continues on forever in one direction.

lexi724 · Answer

i read the question wrong, it is why is it a defined,