Step-by-step explanation:
The three types of Rigid Transformations are Reflection, Rotation, and Translation.
Congruent means equal in all lengths, size and shape.
Rigid transformations are always congruent (or equal) because they never change their form, size or shape. They will always be the same shape and size no matter when it is moved.
They can be congruent when the shape is not different from the original, same size, same length/width, same form.
Dilation is NOT part of a rigid transformation because it widens or decreases its size/shape.
