कोण की अवधारणा (Concept of angles)

Four rays. One ray starts at point A, then points to the left and slightly up through point E. A second ray starts at point A, then points up and slightly to the left through point D. A third ray starts at point A, then points up and slightly to the right through point C. A fourth ray starts at point A, then points to the right and slightly up through point B. A green curved line connects ray AE to ray AD.