圓柱或圓錐體有多少條棱?

圓柱 2棱
圓錐體 1棱
A line segment on the boundary of a face, also called a side.

If face is the intersection of an n-dimensional polytope with a tangent hyperplane. one-dimensional faces is polyhedron edges.

圓柱:無限

圓錐體:無限

棱,係立體中面與面之間的接線.
所以, 圓柱體共有2條棱, 圓錐體共有1條棱.

Unlimited.
just like how can u find out the no. of the radii

Unlimited.
即係無限。