90 degrees
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Supplementary means the sum of two angles equal to 180 degrees. The Sum of 90 degrees would be complimentary, where the sum of two angles equal to 90 degrees.
supplementary angles are equal to 180 degrees. so two congruent(same) angles would be 90 degrees!
Complementary angles are 90 degree angles while supplementary angels are 180 degree angles.You remember it by how complementary angle are 90 degrees more to get a supplementary angles.
Any two supplementary angles will equal 180 degrees when added. Examples: 90+90 60+120 1+179
Only if they both equal 90 degrees.