Question

Give an example of an undefined term and explain why it is undefined.

Answer 1

0^0
1/0

Answer 2

In geometry, a point is an undefined term. It has no dimension.

Answer 3

1/0=undefined..we say undefined when there is no answer on such particular term..

Answer 4

Or how about a line. A line has no thickness. It too is an undefined term.

Answer 5

a line has a definition I'm pretty sure

Answer 6

http://www.wolframalpha.com/input/?i=definition+of+a+line&a=*MC.~-_*MathWorld-

Answer 7

yes, Euclid defined it a very long time ago.

Answer 8

http://www.gradeamathhelp.com/undefined-terms-in-geometry.html

Answer 9

A point has a definition too... literally

Answer 10

things like \[\frac10,\frac00,\infty\cdot0, etc\]are probably what your teacher has in mind

Answer 11

I guess it depends if this is for geometry or algebra.

Answer 12

My response to that link: define "undefined"

Answer 13

"Euclid defined line as a breadth-less length" from the wolfram link I posted
so that is defined in some sense I would argue

Answer 14

I think they us that phrase to teach geometry students about geometrical concepts that can't actually be perceived in reality.

Answer 15

http://en.wikipedia.org/wiki/Euclidean_geometry#Naming_of_points_and_figures
He defined a line in his axioms