Math Games

Grade 3 - Shape and Space

Standard 3.SS.4 - Count the edges of three dimensional shapes.

Included Skills:

Demonstrate understanding of 3-D objects by analyzing characteristics including faces, edges, and vertices.
• 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).
• Critique the statement "the face of a 3-D object is always a 2-D shape".
• Observe and describe the 2-D shapes found on a 3-D object.
• Construct a skeleton of a given 3-D object and describe how the skeleton relates to the 3-D object.
• Determine the number of faces, edges, and vertices of a given 3-D object and explain the reasoning and strategies.
• Critique the statement "a vertex is where three faces meet".
• Sort a set of 3-D objects according to the faces, edges, or vertices and explain the sorting rule used.