3D Shapes (Solid Shapes)

3D shapes have length, width and height — they are solid. Types: Sphere (ball shape — no flat face), Cube (6 equal square faces — dice), Cuboid (6 rectangular faces — brick), Cylinder (2 circular faces, 1 curved surface — tin can), Cone (1 circular face, 1 curved surface — ice cream cone). Roll test: sphere and cylinder roll; cube and cuboid slide.