
 Angle 
  angere, to compress into a bend or to strangle, and the Greek ἀγκύλος (angulοs) crooked, curved; both connected with the Aryan or IndoEuropean root ank, to bend) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. 
  This is also roughly subdivided into the mil, which has several definitions in practice. 
  To the ratio there correspond two angles in the geometric range 0 < θ < 2π, since 
 www.brainyencyclopedia.com /encyclopedia/a/an/angle.html (1444 words) 
