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03-Aug-2015
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## Technology

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### Transcript of Tec 551 interactive activity

1. Objective:TSW discover how to find the surface area of prisms Surface Area of Prisms 2. What is surface area?

• Surface area is literally the area of all of the surfaces of a three dimensional object.
• When you wrap a present, the amount of wrapping paper you use is the surface area of the present.
• When you paint the walls in your house, the area you cover with paint is the surface area of the wall.

http://www.karikakultur.com/painting/paint-roller-tips-tricks.htm 3. One way to find surface area

• Since surface area is finding the area of each surface, that is what we are going to do!
• Area of surface 1:
• A = 5 x 2 =10 ft 2
• Area of surface 2:
• A = 5 x 2 =10 ft 2
• Area of surface 3:
• A = 4 x 2 =8 ft 2
• Area of surface 4:
• A = 4 x 2 =8 ft 2
• Area of surface 5:
• A = 5 x 4 =20 ft 2
• Area of surface 6:
• A = 5 x 4 =20 ft 2

4 ft 5 ft 2 ft 2 ft 5 ft 4 ft 2 ft 5 ft 4 ft Now just add all of the areas together to get the TOTAL surface area. Total Surface Area = 76 ft 2 4. Triangular Prism

• Lets do the same process but with a triangular prism.
• Area of surface 1:
• A = (3 x 4) 2 =6 ft 2
• Area of surface 2:
• A = (3 x 4) 2 =6 ft 2
• Area of surface 3:
• A = 10 x 5 =50 ft 2
• Area of surface 4:
• A = 10 x 4 =40ft 2
• Area of surface 5:
• A = 10 x 3 =30ft 2

Animated Triangular Prism 3 ft 4 ft 5 ft 10 ft Now just add all of the areas together to get the TOTAL surface area. Total Surface Area = 132 ft 2 3 ft 4 ft 10 ft