Дополните диалог:
Paul: What are these?
Ann: These are 1_______.
Paul: What are they?
Ann: They are triangles, 2_______, rectangles and circles.
Paul: Squares have four sides and four angles.
Ann: Triangles have 3_______ sides and three angles.
Paul: Yes, you are right.
Ann: Rectangles have four sides and four angles.
Paul: Circles do not have sides or 4_______.