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well for the rectangular prism its: H x W, H x L, L x W
L- length
W- Width
H- heigth
for a cylinder: 2*pi*R square + 2*pi*R*H
Also for a cylinder: Pi*Diameter*Hieght+2*Radius*radius*pi
okay square means their is a little two next to the number and it mean you have to double (multiply the same number twice like 5*5)the radius(R)
Okay get it good bye.
The surface area is the sum of the areas of all side of the shape.
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