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Warm-up

Warm-up

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Presentation Transcript

1. Warm-up Find the area of the following: show calculations! 1.) 2.) 3.) 12 cm 4 inches 3 inches 3 cm 8ft 8ft

2. Surface Area of Rectangular Prisms

3. A Rectangular Prism has 6 faces Top Back Height Left Right Front Width Length Bottom

4. A Rectangular Prism has 6 faces Top Front Left Bottom Right Back

5. In order to find the surface area, you find the area of each face, then add them all together. Top Width Height Front Left Height Length Width Length Bottom Width Length Right Height Back Height Length Width

6. In order to find the surface area, 2·(length·width) +2·(length·height) +2·(width·height) height width length 2LW+2LH+2WH = SA of Rectangular Prism

7. Let’s Practice!!

8. 1) Find the surface area of the Rectangular Prism 10cm 12cm 8cm

9. 1) Find the surface area of the Rectangular Prism Length = ? Width =? Height = ? 8 cm 12 cm 10 cm 10cm SA = 2·L·W + 2·L·H + 2·W·H =2·(8cm·12cm) + 2·(8cm·10cm) + 2·(12cm·10cm) =2·(96cm2) + 2·(80cm2) + 2·(120cm2) =192cm2+ 160cm2 + 240cm2 = 592 cm2 12cm 8cm

10. 2) Find the surface area of the Rectangular Prism Length = Width = Height = 10m 2m 5m 5m 2m 10m SA = 2·L·W + 2·L·H + 2·W·H =2·(10m·2m) + 2·(10m·5m) + 2·(2m·5m) =2·(20m2) + 2·(50m2) + 2·(10m2) =40m2 + 100m2 + 20m2 = 160m2

11. Now Practice on your Own