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-
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148
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