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).

See also

Central Angle, Thales' Theorem

Explore 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 Angle

Cite this as:

Weisstein, Eric W. "Inscribed Angle." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/InscribedAngle.html

Subject classifications