Congruence simply means harmony or compatibility. The shapes are congruent when they have the same shape and size.
Your information is incomplete. Therefore, an overview of congruence will be given. Two geometric figures are congruent if it's possible to superpose one of them on the other one.
When two similar shapes are placed above each other, and they cover each other, then they are said to be congruent.
Learn more about shapes on:
https://brainly.com/question/24200395