coterminal angles

coterminal angles

[¦kō¦tərm·ən·əl ′aŋ·gəlz]
(mathematics)
Two angles that have the same initial line and the same terminal line and therefore differ by a multiple of 2π radians or 360°.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.