Magnet tiles help you explore 3D figures by counting which features?

• A. Angles and side lengths
• B. Faces, edges, and vertices
• C. Perimeters and areas
• D. Centers and radii

Answer: (B)

Counting the basic parts of a 3D figure—the faces, edges, and vertices—helps you understand what the shape is made of. Magnet tiles are solid shapes with flat faces that meet along edges and come to corners at vertices. By counting how many faces the figure has, how many edges, and how many vertices, you capture its essential structure. These counts stay the same no matter the size or orientation of the shape, so they’re a reliable way to describe and compare 3D figures.

For example, a cube has 6 faces, 12 edges, and 8 vertices, which serves as a quick fingerprint you can check against other shapes. The other options describe properties that aren’t about the whole 3D figure: angles and side lengths relate to individual faces or 2D measurements; perimeters and areas are 2D concepts; centers and radii pertain to circles, not polyhedra. So counting faces, edges, and vertices is the most informative approach when exploring 3D shapes with magnet tiles.