warm up how many corners does the tissue box have? how many flat surfaces? how many folded creases?...

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Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces: 6 Creases: 12

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Page 1: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Warm UpHow many corners does the tissue box have? How many flat surfaces? How many folded creases?Draw a net for the tissue box.

Corners: 8Flat Surfaces: 6Creases: 12

Page 2: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Space Figures and Cross Sections

Objectives:• To recognize polyhedrons and their parts.• To visualize cross sections of space figures.

Page 3: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Vocabulary^

• Why do we study the parts of a ployhedron?We can analyze a three-dimensional figure by using the relationship among its vertices, edges, and faces.

polyhedron

Page 4: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Problem1~

Page 5: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Euler’s Formula

Page 6: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Using Euler’s Formula

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Page 7: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Practice*

Page 8: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Cross Section~

Page 9: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Practice*

Page 10: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Drawing a Cross Section

Page 11: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Practice*

Page 12: Warm Up How many corners does the tissue box have? How many flat surfaces? How many folded creases? Draw a net for the tissue box. Corners: 8 Flat Surfaces:

Homework

• P692: 6, 8, 9, 11, 12, 14, 18-23