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Inscribed Angle

\begin{figure}\begin{center}\BoxedEPSF{CentralInscribedAngle.epsf}\end{center}\end{figure}

The Angle with Vertex on a Circle's Circumference formed by two points on a Circle's Circumference. For Angles with the same endpoints,

\begin{displaymath}
\theta_c=2\theta_i,
\end{displaymath}

where $\theta_c$ is the Central Angle.

See also Central Angle


References

Pedoe, D. Circles: A Mathematical View, rev. ed. Washington, DC: Math. Assoc. Amer., pp. xxi-xxii, 1995.




© 1996-9 Eric W. Weisstein
1999-05-26