Congruence (geometry)

Congruence in geometry means that two shapes are exactly the same size and shape. It's like having two puzzle pieces that fit together perfectly. When we say two shapes are congruent, we mean that if we tried to put them on top of each other, every point on one shape would match up with a point on the other shape. This is because they have the same measurements and angles. It's important to remember that even if two shapes look similar, they might not be congruent if they don't have the same measurements and angles. Congruence is a key concept in geometry because it helps us identify when shapes are the same and can be used to prove mathematical theorems.