TRANSFORMATION THAT KEEP ISOMETRY
Isometry: A transformation that preserves lengths. " Also called Rigid transformation"
Translations: A transformation that maps every two points P and Q in the plane P' and Q' so that the following properties are true:
1. PP' = QQ'
2. PP' ll QQ'
Reflections: A transformation that uses a line that acts like a mirror, called the line of reflection, with an image reflected in the line.
Rotations: A transformation in which a figure is turned about a fixed point, called the center of rotation.