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Let h be the height of the cylinder and r the radius of the circular top/bottom. If you cut the cylinder down one side and roll it out, you have a rectangle. The length of the side is h and the width would be 2pi*r (the perimeter of a circle). Therefore, the perimeter of a cylinder is 2pi*r + 2h
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How do you find the perimeter to a triangle?
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How do you find the perimeter of a regular pentegon?
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