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10.5 Surface Area of Prism

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Surface Area Sum of the areas of the base(s) and the lateral faces of the space figure.

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**Surface Area Formula for Rectangular Prism Using Separate Surfaces**

Find the area of each face (bh) and add together Top+Bottom+ right+ left+front + back Or 2(Top) +2(left)+ 2 (front)

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**Surface Area Formula for Nets**

SA=Lateral Area +2 (Base) SA= LA +2B

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**Using Nets Separate Surfaces Top 3 L Front R Back 3 4 5 4 5 4 5 B**

h L Front R Back 3 4 5 4 5 4 5 P = 18 B Top & Bottom 4 Left & Right Front & Back

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**Surface Area for Triangular Prism**

Separate Surface net SA= 2(Base:triangle) +left(rectangle) +front(rectangle) +back(rectangle) SA= LA to 2 (B)

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**Find the Surface Area Using Separate Surfaces**

Bases: 2(1/2) (4) (3)= 12 Left face: 3(8)=24 Front face: (8)(5) =40 Back face: (4)(8)=32 =108in²

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**Find the Surface Area Using Nets**

. Find the Surface Area Using Nets 3 4 5 6 4 3 6 5

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Homework Page 530 (1,3,5,6,8,10,11,12,15,17)

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Bell Work Find the surface area of the figure. 6 x 4 = 24 in² 3 x 4 = 12 in² 6 x 3= 18 in² Add them up! SA = 24 + 24 + 12 + 12+ 18 + 18 SA = 108 in².

Bell Work Find the surface area of the figure. 6 x 4 = 24 in² 3 x 4 = 12 in² 6 x 3= 18 in² Add them up! SA = 24 + 24 + 12 + 12+ 18 + 18 SA = 108 in².

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