3-D figures are objects that have three dimensions, such as length, width, and height. They can be created using a variety of methods, including computer-aided design (CAD) and 3-D printing. The term '3-D figures' encompasses a wide range of objects, including TORI (4 letters), which are doughnut-shaped objects; SOLIDS (6 letters), which are objects with flat surfaces and straight edges; and SPHERES (7 letters), which are round objects with no flat surfaces.