Question

How many faces, edges, and vertices are there in cylinder, cone, and sphere? How can we say that?

Answer 1

First let us draw the images of cylinder, cone and sphere as follow:

Vertex: the vertex is a point where two or more edges meet. vertices are the corner points.
Thus, cylinder has no vertices.
Cone have $1$ vertex
Sphere has also no vertex.
Faces: Every individual flat surface of a solid is called its face.
Thus, cylinder have $3$ faces.
Cone have $2$ faces.
Sphere have $1$ face.
Edge: The line segment which acts as an interface between two faces is called an edge. or the line segment joining the two points.
Thus, cylinder have $2$ edges.
Cone have $1$ edge.
Sphere has no edge.