What in the World are Nets?

What do you think of when someone mentions a net?

Maybe you think of these?

Cooks Dancers Bunheads Hair Nets Inc. 1) Dancers and cooks often wear hairnets. 2) The bun makes a 3D shape called a Sphere. 3) If we were to spread the hairnet out flat, what 2D shape would the net make? Cooks Dancers Bunheads Hair Nets Inc.

Let’s talk about, NETS in MATH ! ! ! Definition: A Net is a 2-dimensional pattern that you can fold to form a 3-dimensional figure. Example: Figure 1 Figure 2 Let’s talk about, NETS in MATH ! ! !

I like it the way one teacher said it on the internet. When you wrap a present, you’re working with nets.

Parts of a three-dimensional figure Base(s) the ends of a figure, not necessarily the top and bottom.

Parts of a three-dimensional figure Faces All flat sides of a 3-D figure. This figure has 4 faces. 1 – the base 2 – the left side 3 – the right side 4 – the front

Parts of a three-dimensional figure Lateral faces All flat sides of a 3-D figure EXCLUDING the base(s). This figure has 6 faces, but only 4 lateral faces.

Parts of a three-dimensional figure Edges Where two faces meet.

Parts of a three-dimensional figure Vertex, (plural: vertices) Where edges meet, (the corners or points) This figure has 5 vertices!

Types of Three-Dimensional Figures Prism Pyramid Named by base? Shape of lateral faces? # of bases Yes Yes 2 1

Identify the 3-D figure from the net. Rectangular Prism

Identify the 3-D figure from the net. Rectangular Pyramid

Identify the 3-D figure from the net. Triangular Prism

Identify the 3-D figure from the net. Triangular Pyramid

Let’s practice identifying a 3-D figure from a net. Square Pyramid

Identify the 3-D figure from the net. Cube

The End!