deftonesbae
Answered

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pls help find the surface area

Pls Help Find The Surface Area class=

Sagot :

reinhard10158

Step-by-step explanation:

do I see this correctly ? this is not a pyramid but a triangular prism ?

the following bases on this assumption.

the surface area consists of 5 parts :

front and back triangles (2)

left and right rectangles (2)

bottom rectangle (1)

the area of a rectangle is

length × width

the area of a triangle is

baseline × height / 2

so, in our case we have

front and back triangles : 10×12/2 × 2 = 120 in²

left and right rectangles : 2×13 × 2 = 52 in²

bottom rectangle : 10×2 = 20 in²

so, the total surface area is

120 + 52 + 20 = 192 in²

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