Define an equivalence relation. Show that the relation similarity on the set of all triangles in a plene is an equivalence relation.

What is an equivalence relation? Show that the relation of'similarity' on the set S of all triangle in a plane is an equivalence relation.

What is an equivalence relation? Show that the relation of'similarity' on the set S of all triangle in a plane is an equivalence relation.

Show that the relation is congruent to on the set of all triangles in a plane is an equivalence relation

Show that the relation is congruent to on the set T of all triangles in a plane is an equivalence relation.

Show that the relation ‘is congruent to’ on the set of all triangles in a plane is an equivalence relation

Show that the relation is parallel to on the set S of all straight lines in a plane is an equivalence relation.

Show that the relation "is parallel to" on the set S of all straight lines in a plane is an equivalence relation.

Show that set of all parallel lines in any plane is an equivalence relation.

Define an equivalence relation and give an example.