In a circular cylinder, the surface between the two bases is called the ________.

The perpendicular distance between the bases of a circular cylinder is called the ________ of the cylinder.

The altitude of a circular cylinder is also commonly called the ________ of the cylinder.

The line passing through the centers of the bases of a circular cylinder is called the ________ of the cylinder.

A circular cylinder whose lateral surface is perpendicular to its bases is called a ________ circular cylinder.

In a right circular cylinder, the ________ is perpendicular to the bases.

The shaded circles in this cylinder are called the ________ of the cylinder.

The shaded portion in this cylinder is the ________ of the cylinder.

In this cylinder, if A and B are the centers of the bases, then line AB is the ________ of the cylinder.