For
this lesson, students will need to work with a partner and construct
one or more of the geometric solids out of coffee stirrers and twist
ties, straws and pipe cleaners, toothpicks and gumdrops, or other
available supplies. For example, a tetrahedron built out of straws is
shown:
Students should use the Geometric Solids Tool to help them build the physical model.
Each pair of students should record how you constructed each solid in a table, such as the one below.
This is a meaningful activity for students. You may wish to
start with simple polyhedra, such as a cube or a tetrahedron. Students
can rotate their solid, count the faces, corners, and edges and compare
their results with the ones in the table.
Shape | How did you construct the
shape? |
Tetrahedron | |
Cube | |
Octahedron | |
Dodecahedron | |
Icosahedron | |
Irregular Polyhedron | |
Draw attention to the fact that these constructions look like the
transparent shapes in the computer program. They may wish to look at
their shape on the computer, using the transparent tool.
Early finishers can build shapes of their own. As in the previous
part of the lesson, they should record the shape and information about
the shape in their tables.