Angles are complementary when they add up to 90 degrees. For example 60 and 30, or 45 and 45. Angles are supplementary when they add up to 180 degrees. For example 90 and 90, or 100 and 80.
Two right angles are ALWAYS supplementary. If you think about it, a right angle is 90 degrees. Supplementary is when two angles are 180 degrees. 90 and 90 make 180. However two right angles are not complementary. Complementary is when two angles combine to make a right angle. So logically, two right angles can't make a right angle. I hope this helped :)
