Complementary Angles are adjacent angles that have a sum to 90[math]^\circ[/math]. Use the animation below to see Complementary angles in action! Notice that the two Complementary Angles always add to 90[math]^\circ[/math]. If the marking for the 90[math]^\circ[/math] is too distracting, you can remove it to make it easier to see the two complementary angles.