Frae Wikipedia, the free beuk o knawledge
∠, the angle seembol in Unicode is U+2220

In geometry, an angle is the figure furmed bi twa rays, cried the sides o the angle, sharin a common endpoint, cried the vertex o the angle.[1] Angles are uisually presumed tae be in a Euclidean plane or in the Euclidean space, but are an aa defined in non-Euclidean geometries. In pairticular, in spherical geometry, the spherical angles are defined, uisin arcs o great circles insteid o rays.

References[eedit | eedit soorce]

  1. Sidorov, L.A. (2001) [1994], "Angle", in Hazewinkel, Michiel (ed.), Encyclopedia of Mathematics, Springer Science+Business Media B.V. / Kluwer Academic Publishers, ISBN 978-1-55608-010-4