You just need to find the circumference of the circular base (or top). It's the same thing.
(Hint: use C=pi*diameter to find the circumference).
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Depends on the problem; many 3D figures have 2D faces/shapes within them. One can say "find the perimeter of a cylinder," and the question could be interpreted as finding the perimeter of one of the circular bases of the cylinder. Use common sense, and find out what the question is asking.
There is no perimeter of a circle. Only flat shapes have perimeters. You can however, find the circumference, surface area, and volume.
circumference is the perimeter of a circle. a circle is 2 dimensional. volume is 3 dimensional. you need to state what shape it is. I could guess that you are talking about a cylinder. the volume is pi.r2.h, if you find the radius from the volume, you can find the perimeter of the circle by 2.pi.r
To find the perimeter you add and to find the area we multiply.
perimeter of what quadrant?