Two-dimensional (flat) refers to objects or shapes that have only two dimensions: length and width. These shapes do not have depth, meaning they exist on a single plane. Common examples of two-dimensional shapes include squares, circles, and triangles. In art and design, two-dimensional works are often created on surfaces like paper or canvas. This contrasts with three-dimensional objects, which have depth in addition to length and width. Two-dimensional representations can be used in various fields, including graphic design, architecture, and animation.