1. 12.1 Surface Areas of Prisms

2. Polyhedra: a solid with flat faces Poly - many hedra - faces (flat faces) solid shapes faces are polygons lines are edges

3. One type of polyhedron Bases - Two congruent parallel faces Lateral edges – parallel edges that join the vertices of the bases Prism:

4. Lateral faces – faces of the prism that are not the bases and are parallelograms Named by shape of the base

5. Triangular prism: basewidth height

6. Rectangular prism: base width height

7. Hexagonal prism The bases are hexagons. How many sides? What are their shapes?

8. Lateral surface (L.A.): Sum of the area of the lateral faces.

9. Base area: area of the base doubled Total area: lateral area plus 2 base areas

10. Find the surface area 14m 15m 13m 20m 12m SA= A △ + A △ +A +A +A Remember: the 2 △ are the same, but all 3 are not the same!

12. Find the surface for a right rectangular prism with the given dimensions. B=18, L=9, W=9 Draw the picture Write the formula Solve, answer with units