Congruent word means “coinciding over each other when superimposed”
Congruent object are exact copies of each other.
Congruent objects are represented with symbol: ≅
Congruence : The relation of two objects being congruent is called Congruence
Example 1: In the below figure you can see that two cards Ace of Hearts and Ace of Spades are congruent i.e. when both are placed one over other, they coincide exactly.
Example 2: In the below figure you can see that two stamps are again congruent to each i.e. when both are placed one over other, they coincide exactly.
Look at the following few more congruent objects:

