Let T be the set of all triangles in the Euclidean plane, and let a relation R on T be defined as aRb if a is congruent to b ∀ a, b ∈ T. Then R is
A. reflexive but not transitive
B. transitive but not symmetric
C. equivalence
D. None of these
Answer:C
Let T be the set of all triangles in the Euclidean plane, and let a relation R on T be defined as aRb if a is congruent to b ∀ a, b ∈ T. Then R is
A. reflexive but not transitive B. transitive but not symmetric C. equivalence D. None of these