## Lesson: Identifying and Classifying Solid Figures

Developing the Concept

In the first lesson, students learned to recognize and name solid figures. In this lesson, students will explore the parts that make up solid figures.

**Materials:** one rectangular prism, cube, sphere, cone, cylinder, and pyramid for each group of students

**Preparation:** Distribute solid figures to groups of students.

**Prerequisite Skills and Background:** Students should be able to recognize and name solid figures.

**Wrap-Up and Assessment Hints**

Encourage students to explore more attributes of regular solid figures. Ask questions such as the following: *Which solid figures have opposite faces that are parallel?* (rectangular prism, cube, cylinder) *Which solid figures have opposite faces that are congruent?* (rectangular prism, cube, cylinder, pyramid) *Which solid figure has all congruent faces?* (cube) Through questioning strategies such as these, you will be able to judge your students' understanding of solid figures.