Can someone please help me? I just want to be able to understand the terminology of "Undefined" in Geometry. What is the formula, how do you make it work out?

Because, this is what I'm trying to solve and I have no understanding of it what-so-ever.

What is undefined B?

Question

Can someone please help me? I just want to be able to understand the terminology of "Undefined" in Geometry. What is the formula, how do you make it work out?

Because, this is what I'm trying to solve and I have no understanding of it what-so-ever.

What is undefined B?

anonymous · Answer

attachment

hartnn · Answer

do you have choices ? i don't believe i have not heard of that before. http://www.gradeamathhelp.com/undefined-terms-in-geometry.html the answer could be one word - "point"

anonymous · Answer

I have no choices, and this is like... Destroying my brain, I've tried all numbers on that scale...

anonymous · Answer

And it is none of the undefined terms...

hartnn · Answer

tried numbers ? are u sure the answer is a number ? try 'point'

anonymous · Answer

These are my only tips, by the way.

undefinedB means the distance from  to B.

undefinedB=|−−2|

undefinedB=|NaN|

undefinedB=NaN

anonymous · Answer

I already used, point, plane and line. None of them wworked.