It is necessary for us to combine the two formulas because we must find the height of either a cylinder or of its for a pentagonal prism. Once you find the height you can than substitute it into the surface area formula. Which then makes everything much simpler for us.
I can apply the skills when finding the height of my can.I would first find the height of my can and justify each of my steps. Then I would take the height and substitute it into the SA formula. Then I would simplify and justify all of my steps.
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Good job!
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