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Marcos wants to paint his skateboard ramp shown below. What is the total surface area of the skateboard ramp?​

 

 Mar 12, 2021
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The surface area of a prism is the perimeter of the base times the height, plus two times the area of the base. In this case the base is a triangle so we have a triangular prism.

 

surface area   =   ( perimeter of base ) * ( height of prism )  +  2 * ( area of base )

 

surface area   =   ( 2 ft  +  1.5 ft  +  2.5 ft ) * ( 10 ft )  +  2 * ( 1/2  *  2 ft  *  1.5 ft )

 

surface area   =   ( 6 ft ) * ( 10 ft )  +  2 * ( 1.5 ft2 )

 

surface area   =   60 ft2  +  3 ft2

 

surface area   =   63 ft2

 Mar 13, 2021

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