An acute angle with the same values of trigonometric functions, up to sign, as another angle: used for easy reference when examining the non-acute angle.

plural of reference angle

(chemistry) The angle between two bonds that have a common atom

plural of torsion angle

(idiomatic) To seek ways to advance one's self-interest, especially by making choices in a calculating or crafty manner; to scheme.

Synonym of play the angles

plural of carpal angle

(zoology) The angle at the last joint of the folded wing of a bird.

(carpentry) An upright bar at the angle where two faces of a polygonal or bay window meet. / An angle iron.

An angle or space which cannot be seen or defended from behind the parapet of a fortification.