1. A figure that shows a real figure with accurate sizes reduced or enlarged by a certain amount (the scale factor) is called scale copy.
2. Two figures are congruent if they are the same size and shape - that is, if their corresponding angles and sides are equal (or scaled copies with scale factor 1).
3. Square is a quadrilateral that has equal sides and every angle is a right angle (90°).
If you have two squares with the same side lengths, then they have
- congruent corresponding sides (they are all equal);
- congruent corresponding angles (they are all right).
This means that two squares with the same side lengths are congruent or are scaled copies of each other (with scale factor 1).