Proportional shapes are figures that maintain the same relative dimensions, meaning their corresponding sides and angles are in a consistent ratio. For example, if one triangle has sides of 3, 4, and 5 units, a triangle with sides of 6, 8, and 10 units is proportional to it because the ratios of the sides are the same. These shapes are important in various fields, including art, architecture, and mathematics. Understanding proportionality helps in creating designs that are visually appealing and structurally sound. Common examples of proportional shapes include similar triangles and rectangles, where the shape remains consistent despite size changes.