translation

In mathematics, the movement of a point, line, or shape along a straight line. Translations may be combined with rotations and reflections.

For example:

The triangle A'B'C' is a translation of triangle ABC. All the points on triangle ABC have been moved the same distance.

The amount and direction of a translation can be described using vector notation. In the example, the vector for the translation would be:

that is, a translation of 3 squares right and 2 squares up.

The translation of A'B'C' to ABC would be described as:

that is, 3 squares left and 2 squares down.