1. Surface Area of Triangular Prisms Greg Morrison

2. Definition: The sum of the areas of all of the faces of a three-dimensional figure. Ex. How much construction paper will I need to fit on the outside of the shape?

3. A triangular prism has 5 faces. FRONT BACK RIGHT LEFT BOTTOM 2 Triangular bases 3 rectangular sides

4. Surface Area of a Triangular Prism If we break down our triangular prism into a net, it looks like this: In a triangular prism there are five sides, two triangles and three rectangles.

5. A triangular prism has 5 faces. FRONT BACK RIGHT LEFT BOTTOM

6. In order to find the surface area, find the area of each face. Then sum all of the areas. FRONT BACK RIGHT LEFT BOTTOM

7. Side 1½(9 × 4)18 cm 2 Side 2½(9 × 4)18 cm 2 Side 34.5 x 8.136.45 cm 2 Side 49 x 8.172.9 cm 2 Side 57.2 x 8.158.32 cm 2 TOTAL203.67 cm 2

8. Practice Time!

9. Find the Surface Area

10. 8.5 cm 2.2 cm 2 cm

11. Find the Surface Area 5 cm 3 cm

12. Find the Surface Area