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Circle Inscribing

If $r$ is the Radius of a Circle inscribed in a Right Triangle with sides $a$ and $b$ and Hypotenuse $c$, then

\begin{displaymath}
r={\textstyle{1\over 2}}(a+b-c).
\end{displaymath}

See Inscribed, Polygon




© 1996-9 Eric W. Weisstein
1999-05-26