Point symmetry: symmetry around a point If you were to place a point in the center of the shape, and place a "pin" there, then rotate the shape around that point 180 degrees, the shape would match up. This shape has point symmetry.
Line symmetry: symmetry across the point If you were to draw a line through the top right and bottom left corner of the shape, and fold the shape over the line, it would match up. This shape has line symmetry.