A Miquel equation is given by
 |
where 
is a directed angle.
Miquel Equation
See also
Directed Angle, Miquel's Theorem, Pivot TheoremExplore with Wolfram|Alpha
References
Johnson, R. A. Modern Geometry: An Elementary Treatise on the Geometry of the Triangle and the Circle. Boston, MA: Houghton Mifflin, pp. 131-144, 1929.Referenced on Wolfram|Alpha
Miquel EquationCite this as:
Weisstein, Eric W. "Miquel Equation." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/MiquelEquation.html