diameterDiameter22002-02-15 22:38:252002-02-23 03:01:00Definition\usepackage{graphicx}The diameter of a circle or a sphere is the length of the segment joining a point with the one symmetrical respect to the center. That is, the length of the longest segment joining a pair of points.
Also, we call any of these segments themselves a diameter. So, in the next picture, $AB$ is a diameter.
%\begin{figure}
\begin{center}
%\fbox{\input{circ.eepic}}
\includegraphics[scale=0.625]{diameter.eps}
\end{center}
%\end{figure}
The diameter is equal to twice the radius.