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Apothem

\begin{figure}\begin{center}\BoxedEPSF{Apothem.epsf scaled 1200}\end{center}\end{figure}

Given a Circle, the Perpendicular distance $a$ from the Midpoint of a Chord to the Circle's center is called the apothem. It is also equal to the Radius $r$ minus the Sagitta $s$,

\begin{displaymath}
a=r-s.
\end{displaymath}

See also Chord, Radius, Sagitta, Sector, Segment




© 1996-9 Eric W. Weisstein
1999-05-25