If consecutive angles of a 4-sided figure were complementary, then all four of them
would add up to 180°. But that's a problem, because we all know that the sum of all
four angles in any 4-sided figure is always 360°. So the answer must be: 'No'.
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No, complementary angles aren't normally congruent.
Vertical angles must be congruent so if they are complementary, they must be 45 degrees to be complementary.
Then it's consecutive angles are supplementary.
Complimentary angles
Complementary angles are angles that add up to 90 degrees. So, the complementary angle of 70 degrees would be 20 degrees