Consider three right angle triangles T1
with sides 3, 4, 5,  T2 with sides 5, 12, 13 and T3 with sides 6, 8, 10 Which
triangles among T1, T2 and T3 are related 13 Show that the relation R defined in the set A of all polygons as R = {(P1, P2) :
P1 and P2 have same number of sides}, is an equivalence relation