Grade 3 - Shape and Space
Standard 3.SS.4 - Count the vertices of three dimensional shapes.
Included Skills: Geometry
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.