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54 degrees 180 - 126 = 54
An angle whose measure is exactly 180 degrees is a straight angle.
An angle whose measure is 78 degrees!
this is a acute angle
we know that a supplementary angles when sum up is equal to 180 degrees. we let y-be the supplementary angle of v therefore, v+y=180 then, y=180-v that will be now the supplementary of the angle v. -by:-kidz-