# 10.5 Surface Area of Prism.

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10.5 Surface Area of Prism

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

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)

Surface Area Formula for Nets
SA=Lateral Area +2 (Base) SA= LA +2B

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

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

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

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

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