A Shape is a line that is “closed”. They have an interior (inside) and an exterior (outside). All shapes are two-dimensional, meaning that they have only length and width.
All shapes will fall into one of two categories. Geometric shapes (or regular shapes) are easy to recognize. Math can be used to find information about these shapes and these shapes generally have a specific name associated with them. Examples include: circle, triangle, square, and trapezoid.
Organic or “freeform” shapes are shapes that seem to follow no rules. Organic shapes are generally representative of things found in nature and are typically not man-made.