**Materials:** one rectangle-shaped prism, cube, sphere, cone, cylinder, and also pyramid because that each group of students

**Preparation:** distribute solid numbers to teams of students.

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**Prerequisite skills and Background:** student should have the ability to recognize and name heavy figures.

**Ask:**

*Which solid numbers have faces that are polygons?*(rectangular prism, cube, and pyramid)

**Say:**

*Put the other solid numbers aside for now.*

**Ask:**

*Which solid number has encounters that room rectangles?*(rectangular prism)

**Say:**

*Count the variety of faces a rectangle-shaped prism has. Mark an X ~ above each face as friend count.*Copy this table ~ above the board together students room working.

Solid Figure

Number of Faces

Number the Edges

Number of Vertices

Solid figure Rectangular Prism |

**Ask:**

*How countless faces go a rectangular prism have?*(6) document 6 on the table.

**Say:**

*The line segment whereby two encounters meet is an edge. Counting the variety of edges a rectangle-shaped prism has.*Mark one X on every edge as you count.

**Ask:**

*How many edges does a rectangular prism have?*(12) document 12 ~ above the table.

**Say:**

*The allude where edges fulfill is a vertex. Count the number of vertices a rectangular prism has.*Mark one X on each vertex as you count.

**Ask:**

*How numerous vertices go a rectangle-shaped prism have?*(8) document 8 top top the table.Have students uncover the variety of faces, edges, and vertices the a cube and a pyramid. Record the answer in the table.

Solid Figure

Number of Faces

Number of Edges

Number that Vertices

Solid figure Rectangular Prism | variety of Faces 6 | number of Edges 12 | number of Vertices 8 |

Solid number Cube | number of Faces 6 | variety of Edges 12 | variety of Vertices 8 |

Solid number Pyramid | number of Faces 5 | variety of Edges 8 | variety of Vertices 5 |

**Ask:**

*Why do you think the a rectangle-shaped prism and also a cube have the same number of faces, edges, and also vertices?*Lead students come realize the the faces of a rectangular prism and also a cube space all rectangles, yet in the situation of the cube, the rectangles are squares. A cube is a special rectangular prism.

**Say:**

*Take the end your solid numbers that have actually curved surfaces. Look at the sphere.*

**Ask:**

*Does a ball have any type of edges or vertices?*(no)

*Why not?*Students need to realize that a sphere has actually no faces, so it can"t have any edges or vertices.

**Say:**

*Look in ~ the cone.*

**Ask:**

*Does a cone have any kind of edges?*(no)

*Why not?*Students need to realize that a cone has only one face, and you need much more than one face to type an edge.

**Ask:**

*Does a cone have any type of vertices?*Lead college student to see that a cone has actually no edges, but the point where the surface of the cone ends is called the vertex of the cone.

**Say:**

*Look at the cylinder.*

**Ask:**

*Does a cylinder have any kind of edges or vertices?*(no)

*Why not?*Students need to realize that although a cylinder has actually two faces, the deals with don"t meet, so there space no edges or vertices.

**Wrap-Up and also Assessment Hints**Encourage students come explore more attributes of constant solid figures. Ask inquiries such together the following: *Which solid numbers have opposite faces that room parallel?* (rectangular prism, cube, cylinder) *Which solid figures have opposite deals with that room congruent?* (rectangular prism, cube, cylinder, pyramid) *Which solid figure has every congruent faces?* (cube) with questioning methods such as these, friend will have the ability to judge your students" knowledge of solid figures.

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