Three-dimensional shapes (cubes, rectangular prisms, spheres, cylinders, cones) have faces (flat surfaces), edges (lines where faces meet), and vertices (corners). Understanding these properties helps recognize shapes in real-world contexts.
You have already learned to recognize 3D shapes — you can spot a cube or a sphere when you see one. Now we go one step further and describe *what makes each shape the way it is*. Instead of just naming shapes, we count and describe their parts. This is how mathematicians think: not just recognizing things but understanding their properties.
Every 3D shape has three kinds of parts to look for. A face is a flat surface — like the side of a box. An edge is a line where two faces meet — like the corner of a tabletop. A vertex (or corner) is a point where edges come together — like the pointy tip of a party hat or the corner of a book. Try touching the face, edge, and vertex of a box near you right now.
Different shapes have different counts of these parts. A cube has 6 faces (all squares), 12 edges, and 8 vertices. A rectangular prism (like a cereal box) has the same counts but with rectangular faces. A sphere has no flat faces, no edges, and no vertices — it is perfectly round all the way around. A cylinder has 2 circular faces, 2 edges (the circles where the flat top and bottom meet the curved side), and no vertices. A cone has 1 circular face, 1 edge, and 1 vertex at its tip.
You can find these shapes everywhere. A dice is a cube. A soup can is a cylinder. A basketball is a sphere. An ice cream cone is a cone. A brick is a rectangular prism. When you look at those objects, you can now describe exactly what makes them shaped the way they are — how many flat faces, how many edges, how many corners. That is what "attributes" means: the specific features that describe a shape's properties.