Shapes are always areas defined by the the borders of an enclosing outline or contour.

two-dimensional, or flat, area

Explanation:

The shapes are defined as the two-dimensional figure that maybe flat areas.

The shapes encloses a certain area within the outline or the contour that distinguishes the different shapes.

The shape maybe of anything i.e it maybe human, a living thing or a non living thing or objects.

The different geometric shapes are

square

rectangle

circle etc.