# Modern Geometry

1. Jan 22, 2009

### mamma_mia66

1. The problem statement, all variables and given/known data

Define the following terms:
a) Midpoint M of segment AB.
b) Perpendicular bisector of a segment AB (you may use the term "midpoint" since ypu have just defined it).
c) Ray BDbisects angle ABC (given that point D is between A and C)
d) Points A, B, and C are collinear .
e) Lines l, m, and n are concurrent .

I need to use the five undefined geometric terms: line,point, "lie on", between, congruent.

2. Relevant equations

3. The attempt at a solution

I am lost. I used the dictionary, but still confused. I will apreciate any help.

2. Jan 22, 2009

### mamma_mia66

I am gessing for (d) Points A, B, and C lie on one line.

3. Jan 22, 2009

### NoMoreExams

Have you tried wikipedia, mathworld, and/or planetmath?

4. Jan 22, 2009

### mamma_mia66

No, I tried only online dictionary, but not much help. I will try these above. I tried google as I as can, but....
Thank you.

5. Jan 22, 2009

### NoMoreExams

No problem, at your level, I would first try wikipedia then planetmath. Mathworld sometimes has a tendency to go crazy with linking definitions and one starts losing sight of the forest. Good luck.