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Known as a dodecahedron, the formula for the surface area = 3×√(25+10×√5) × (Edge Length)2

Q: What is the formula for determining the surface area of a twelve sided prism?

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A surface area would be vital for determining volume

LxWx2

There must be a typo in this question, "Why does the formula for finding the surface area of arectangular prism is helpful?" What does that even mean?

S=2B+Ph

yes. base area x height lxwxh No. Above answer gives volume not surface area. Surface area formula will differ depending on type of prism.

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A surface area would be vital for determining volume

LxWx2

There must be a typo in this question, "Why does the formula for finding the surface area of arectangular prism is helpful?" What does that even mean?

perpendicular height

S=2B+Ph

its not i dont no why

surface area of a rectangular prism is the formula: 2lw+2wh+2lh

yes. base area x height lxwxh No. Above answer gives volume not surface area. Surface area formula will differ depending on type of prism.

I am not sure that a rectangular prism is in any position to care!

The formula will depend on what it is that you are trying to find: the volume or the surface area.

Surface area = 2LW + 2(L+W)H

Surface Area = 2 × Base Area + Base Perimeter × Length