"2-D (Flat)" refers to a two-dimensional space that has only length and width, without any depth. This means that objects in a 2-D space can be represented on a flat surface, such as a piece of paper or a computer screen. Common examples of 2-D shapes include squares, circles, and triangles. In art and design, 2-D works can include drawings, paintings, and digital graphics. These creations rely on techniques like color, line, and texture to convey depth and perspective, even though they exist in a flat format. Popular forms of 2-D art include cartoons and illustrations.