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.
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Wrap-Up and also Assessment HintsEncourage 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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