Question

examine the cone.
identify the parts of the cone.
which letter represents the center of the base?
which letter represents the vertex?
which line segment can represent the radius?

Explanation:

Step1: Recall the definition of vertex

A vertex of a cone is the pointed end. In the given cone, point \( A \) is the pointed end.

Step2: Recall the definition of radius

The radius of the base of a cone is the distance from the center of the base (point \( B \)) to any point on the circumference of the base (points \( C \) or \( D \)). So line - segment \( CB \) (or \( DB \)) is a radius.

Answer:

The letter representing the vertex is \( A \).