1. Nets and Surface Area – Draw two-dimensional models for three-dimensional figures. – Find surface area. Designers use wind tunnels to study the shapes of surfaces to design vehicles that are faster and more efficient.

2. DRAWINGS OF THREE-DIMENSIONAL FIGURES

3. Isometric Dot Paper

4. Isometric Graph Paper

5. SURFACE AREA Nets are very useful in visualizing the polygons that make up the surface of a solid.

6. Tetrahedron 4 Faces 4 Vertices 6 Edges SURFACE AREA The surface area is the sum of the areas of each face of the solid.

7. Example 1 Nets and Surface Area Draw a net for the right triangular prism shown. 5 5 51213 10 12 13 h

8. 5 5 51213 10 Example 1 Nets and Surface Area Use the net to find the surface area of the triangular prism.