An inscribed angle is an angle 
formed by points 
, 
,
and 
on a circle's circumference
as illustrated above.
For an inscribed angle 
and central angle 
with the same endpoints,
 |
(Jurgensen et al. 1963, p. 328).
Inscribed Angle
See also
Central Angle, Thales' TheoremExplore with Wolfram|Alpha
References
Jurgensen, R. C.; Donnelly, A. J.; and Dolciani, M. P. Th. 42 in Modern Geometry: Structure and Method. Boston, MA: Houghton-Mifflin, 1963.Pedoe, D. Circles: A Mathematical View, rev. ed. Washington, DC: Math. Assoc. Amer., pp. xxi-xxii, 1995.Referenced on Wolfram|Alpha
Inscribed AngleCite this as:
Weisstein, Eric W. "Inscribed Angle." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/InscribedAngle.html