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surface area of prisms. please help with the work shown because i can't figure out how to solve these :(

surface area of prisms. please help with the work shown because i can't figure out-example-1
User Jeepston
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here: :)

I did the work, and basically i solved for the area of the faces and then multiplied that by two to get the total surface area of the faces. Then I added in the areas of the sides connecting the two faces:

just as a referral: the formulas to find the faces are as follows:

rectangle: length times width

circle: pi x r^2

trapezoid: h(base1 + base2)

and triangle: (b x h)/2

surface area of prisms. please help with the work shown because i can't figure out-example-1
User Osman Durdag
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