A circle is an axisymmetric figure, and each diameter is its axis of symmetry______ .

A circle is an axisymmetric figure, and each diameter is its axis of symmetry______ .

If the straight line of each diameter of a circle is folded in half, the two parts after folding can completely coincide. Therefore, the straight line of each diameter is its axis of symmetry. Therefore, the diameter of a circle is not its axis of symmetry, and the straight line of the diameter of a circle is its axis of symmetry