What is it called when a figure retains its appearance even when flipped upside down?

When a figure retains its appearance even when flipped upside down, it exhibits point symmetry. This means that for every point in the figure, there is a corresponding point at an equal distance from a central point in the opposite direction. In practical terms, if you were to place a point at the center of the figure and draw lines from that point to the edges, each point on one side would have an identical counterpart directly opposite it, maintaining the same arrangement even when inverted.

In contrast, rotational symmetry involves a figure looking the same even after being rotated around a central point, which is not specifically about flipping it upside down. Reflectional symmetry refers to figures that are mirror images across a line, which does not apply to the flipping action described here. Asymmetry indicates a lack of symmetry, which does not fit the scenario of retaining appearance upon being flipped. Thus, point symmetry accurately describes the property that is being asked about.