Demonstrate understanding of 3-D objects by analyzing characteristics including faces, edges, and vertices.
[C, V]
| (a) |
Observe and describe the faces, edges, and vertices of given 3-D objects, including cubes, spheres, cones, cylinders, pyramids, and prisms (e.g., drum, tipi, South American Pyramids, and other objects from the natural environment). |
| (b) |
Critique the statement "the face of a 3-D object is always a 2-D shape". |
| (c) |
Observe and describe the 2-D shapes found on a 3-D object. |
| (d) |
Construct a skeleton of a given 3-D object and describe how the skeleton relates to the 3-D object. |
| (e) |
Determine the number of faces, edges, and vertices of a given 3-D object and explain the reasoning and strategies. |
| (f) |
Critique the statement "a vertex is where three faces meet". |
| (g) |
Sort a set of 3-D objects according to the faces, edges, or vertices and explain the sorting rule used. |

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