Congruent - the same
Two shapes are congruent when you can turn, flip, and or slide one so it fits exactly on top of the other (identical size and shape) - the same.
The con grew ants (congruent), but they all looked exactly the same.
Example 1
If these arrows were placed on top of each other and were facing the same way, they would be exactly the same and so they are congruent.
Example 2
These two triangles are congruent because if you slide them over each other, they would fit perfectly.
Example 3
Although one of these rectangles is on its side, they are still congruent. If you rotate one, it would fit perfectly over the other.
Example 4
These odd shapes fit perfectly over one another, and so they are congruent shapes.