1. Geometry Surface Area of Triangular Prisms

2. Surface Area  Triangular prism – a prism with two parallel, equal triangles on opposite sides. To find the surface area of a triangular prism we can add up the areas of the separate faces. l wh

3. Surface Area  In a triangular prism there are two pairs of opposite and equal triangles. We can find the surface area of this prism by adding the areas of the pink side (A), the orange sides (B), the green bottom (C) and the two ends (D). 7 cm 5 cm2 cm 8 cm A B C

4. Surface Area  We should use a table to tabulate the various areas. Example: SideAreaNumber of Sides Total Area A B C D Total 7 cm 5 cm2 cm 8 cm A B C

5. Surface Area  We should use a table to tabulate the various areas. Example: SideAreaNumber of Sides Total Area A40 cm 2 1 B C D Total 7 cm 5 cm2 cm 8 cm A B C

6. Surface Area  We should use a table to tabulate the various areas. Example: SideAreaNumber of Sides Total Area A40 cm 2 1 B10 cm 2 1 C D Total 7 cm 5 cm2 cm 8 cm A B C

7. Surface Area  We should use a table to tabulate the various areas. Example: SideAreaNumber of Sides Total Area A40 cm 2 1 B10 cm 2 1 C35 cm 2 1 D Total 7 cm 5 cm2 cm 8 cm A B C

8. Surface Area  We should use a table to tabulate the various areas. Example: SideAreaNumber of Sides Total Area A40 cm 2 1 B10 cm 2 1 C35 cm 2 1 D7 cm 2 214 cm 2 Total 7 cm 5 cm2 cm 8 cm A B C D

9. Surface Area  We should use a table to tabulate the various areas. Example: SideAreaNumber of Sides Total Area A40 cm 2 1 B10 cm 2 1 C35 cm 2 1 D7 cm 2 214 cm 2 Total5 99 cm 2 7 cm 5 cm2 cm 8 cm A B C D

10. Surface Area  Now you try...find the surface area! Example: C B SideAreaNo of Sides Area

11. Surface Area  Now you try...find the surface area! Example: C B SideAreaNo of Sides Area 2.0m 11.0m 2.1m 2.0m