four or more points which lie on circle are said to be con cyclic triangles.

What is meant by concyclic?

1 : lying on one and the same circle —used of a system of points. 2 : cut in circles by the same parallel planes —used of certain systems of quadrics.

What is the condition for concyclic points?

Theorem: If the segment joining two points A and B subtends equal angles at two other points C and D on the same side of AB, then the four points are concyclic.