A cone?
ONE
A cone has one curved surface.
A cone has either one or two surfaces and either one or no edges.
It has one.
1
1
one
One
A cone has two surfaces, one vertex and no edges.
1 edge and 2 surfaces
ther is 20 surfaces on a cone because the is 1 on it sharp part * * * * * In fact, one flat surface (and one curved one).