## Geometric Solids and Their Properties

In five interactive geometry investigations, students explore geometric solids and their properties. Within each lesson, students use visualization, spatial reasoning, and geometric modeling to solve problems.

**Math
Content**

Students will:

- Analyze characteristics and properties of three-dimensional geometric shapes.
- Develop mathematical arguments about geometric relationships.
- Construct various geometric solids using an interactive tool.
- Explore and create nets for various geometric solids.

### Getting to Know the Solids

3-5

Students are introduced to some of the basic polyhedra. Students explore the shapes of the faces of these solids.### Study the Solids

3-5

In this interactive geometry investigation, students explore geometric solids and their properties. Specifically, students count the number of faces, edges, and corners (vertices) in various solids.### Looking for Patterns

3-5

Students discover Euler's Formula, a way of calculating the number of faces, edges, and vertices of geometric solids.### Construct a Solid

3-5

Students construct physical models of geometric solids.### Making A Shape Jacket

3-5

Students identify which geometric solids can be made from given nets. Students also create nets for common geometric solids.