An isometry, t, is called a translation iff for all points P and Q, the points P, Q, T(P) and T(Q) would form a parallelogram if joined appropriately.

An isometry, t, is called a translation iff for all points P and Q, the points P, Q, T(P) and T(Q) would form a parallelogram if joined appropriately.

Translations are direct motions (orientation preserving).

(overhead illustration)

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