And ordered pair (A, B) of points in a plane, where A is the head of the bipoint, and B is its tail.

- A bipoint (A, B) is characterized by its direction and magnitude. Its direction is the line AB, its magnitude is the measure of the segment AB and its sense is the orientation of A towards B.
- The algebraic measure of bipoint (A, B) is written: m(A, B). The following may also be written:

m(A, B) = −m(B, A). - Therefore, bipoint (A, B) represents the vector \(\overrightarrow{AB}\).

### Exemple

This illustration shows bipoints (*a*, *b*) and (*c*, *d*).