Asked by brigit

how many vertices, edges and faces does a cylinder have? How do you find the perimeter and area of the base?

Thank you.

Answers

Answered by Jai
This actually depends on you definition of faces and edges.
If face is not necessarily flat, and edge is where two faces meet, then A cylinder has 3 faces, 2 edges and 0 vertices.

Area of the base of cylinder: A cylinder has base in shape of circle, and there are two circles - at the top and the bottom. Thus,
A,base = 2πr^2

Perimeter of cylinder: I'm not sure about this one. I rarely see problems that needs to solve for 'perimeter' of cylinder, since cylinder is a 3D shape. Usually it's volume or surface area (SA). If surface area,
SA,cylinder = 2πr^2 + 2πrh

hope this still helps~ `u`
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