WordReference Random House Unabridged Dictionary of American English © 2020
adjacent angles, [Geom.]
  1. Mathematicstwo angles having the same vertex and having a common side between them.

Collins Concise English Dictionary © HarperCollins Publishers::
adjacent angles pl n
  1. two angles that have the same vertex and a side in common
'adjacent angles' also found in these entries:

Report an inappropriate ad.