Course: 7th Grade Math DETAIL LESSON PLAN Wednesday, February 22 / Thursday, February 23 Student Objective (Obj. 3b) TSW… identify three dimensional figures from nets. Lesson 8-9 Three-Dimensional Figures Textbook Pages: 414-418

Extra Resources Geometric solids. Homework Test next class. Complete and review your study guide. Last Night’s Homework 3D Worksheet (10 problems)

Bellwork 9 weeks study guide problem numbers: ___________ - ___________

Prior Knowledge

Last class, we learned to identify 2D and 3D figures. Anticipatory Set

Today, we will build upon that knowledge of 3D figures and learn about something called “Nets”.

Show PowerPoint “What in the world are nets?” Teacher Input

Review bellwork

Review homework

Show PowerPoint “What in the World are Nets?” to lead into today’s lesson on nets.

Pass out student notes

Use the geometric solids to illustrate what each net looks like as a 2D figure vs a 3D figure.

Have students work you-try problems (independently).

Classwork: Complete study guide (math to music)

Assessment Observation and questioning.

Closure 1) What is a net? 2-D pattern that you can form into a 3-D figure. 2) Show examples of nets and have students name the 3D solid.

Student Notes Lesson 8-9 Nets Textbook Pages 414 – 419

A Net is a two-dimensional pattern that you can fold to form a 3-dimensional shape.

Example: Figure 1 and Figure 2 below show two possible nets for a cube.

Figure 1 Figure 2

You try: Name the three dimensional figure from each net.

Answer Key

Independent Practice

Independent Practice Answer Key

Name: _____Answer Key_________________ Period: ___________ Date: _____________

3D Figures / Nets

Part 1 2 Dimensional Figures

1) How many sides does each of the following figures have?

__4__ Quadrilateral _10__ Decagon __8__ Octagon

__6__ Hexagon _ 9__ Nonagon __7__ Heptagon

__5__ Pentagon __3__ Triangle

Part 2 3 Dimensional Figures

2) Use the word bank to match the following 3-D figures.

A) Triangular Prism B) Pentagonal Pryamid C) Hexagonal Prism D) Cylinder E) Cone

____D______ ____B________ _____C_________ ______E_________ _____A________

Cylinder Pentagonal Pyramid Hexagonal Prism Cone Triangular Prism

3) Identify the number of faces, verticies, and edges of the following figure.

Faces: ____4______ Vertices: _____4______ Edges: ____6_____

4) Which 3-D solid figure exactly 6 vertices? (Hint: Don’t forget pyramids have a vertex on the top!)

Pentagonal pyramid Hexagonal pyramid

5) What properties describe this 3-D shape?

__9__ Faces __14__Vertices __21__Edges

What is the shape of the base? ____Heptagon______

What is the name of the shape? ____Heptagonal Prism______

6) What properties describe this 3-D shape?

__6__ Faces __6__Vertices __10__Edges

What is the shape of the base? ____Pentagon______

What is the name of the shape? ____Pentagonal Pyramid______

Part 3 Nets

7) Use the word bank to match the following nets to their 3-D figures.

A) Triangular Prism B) Pentagonal Prism C) Cylinder D) Triangular Pyramid E) Cone

_____A_____ _____E_______ ____C________ _____D_______ ____B_______

Triangular Prism Cone Cylinder Triangular Pyramid Pentagonal Prism

8) Which solid does the following net represent?

A. B. C. D.

Name: ________________________________ Period: ___________ Date: _____________

3D Figures / Nets

Part 1 2 Dimensional Figures

1) How many sides does each of the following figures have?

_____ Quadrilateral _____ Decagon _____ Octagon

_____ Hexagon _____ Nonagon _____ Heptagon

_____ Pentagon _____ Triangle

Part 2 3 Dimensional Figures

2) Use the word bank to match the following 3-D figures.

A) Triangular Prism B) Pentagonal Pryamid C) Hexagonal Prism D) Cylinder E) Cone

___________ _____________ _______________ ________________ ______________

3) Identify the number of faces, verticies, and edges of the following figure.

Faces: __________ Vertices: ___________ Edges: _________

4) Which 3-D solid figure exactly 6 vertices? (Hint: Don’t forget pyramids have a vertex on the top!)

Pentagonal Pyramid or Hexagonal Pyramid

5) What properties describe this 3-D shape?

______ Faces ______Vertices ______Edges

What is the shape of the base? __________________

What is the name of the shape? __________________________

6) What properties describe this 3-D shape?

______ Faces ______Vertices ______Edges

What is the shape of the base? __________________

What is the name of the shape? __________________________

Part 3 Nets

7) Use the word bank to match the following nets to their 3-D figures.

A) Triangular Prism B) Pentagonal Prism C) Cylinder D) Triangular Pyramid E) Cone

_____________ ______________ _______________ _______________ _______________

8) Which solid does the following net represent?

A. B. C. D.